Use consistent exception messages in Assert calls

Update `Assert` calls to consistently use messages of the form
"'item' must [not] ...".

Closes gh-43780

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/availability/AvailabilityProbesHealthEndpointGroups.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -48,7 +48,7 @@ class AvailabilityProbesHealthEndpointGroups implements HealthEndpointGroups {
 	private static final String READINESS = "readiness";
 
 	AvailabilityProbesHealthEndpointGroups(HealthEndpointGroups groups, boolean addAdditionalPaths) {
-		Assert.notNull(groups, "Groups must not be null");
+		Assert.notNull(groups, "'groups' must not be null");
 		this.groups = groups;
 		this.probeGroups = createProbeGroups(addAdditionalPaths);
 		Set<String> names = new LinkedHashSet<>(groups.getNames());

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/availability/DelegatingAvailabilityProbesHealthEndpointGroup.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,7 +37,7 @@ class DelegatingAvailabilityProbesHealthEndpointGroup implements HealthEndpointG
 
 	DelegatingAvailabilityProbesHealthEndpointGroup(HealthEndpointGroup delegate,
 			AdditionalHealthEndpointPath additionalPath) {
-		Assert.notNull(delegate, "Delegate must not be null");
+		Assert.notNull(delegate, "'delegate' must not be null");
 		this.delegate = delegate;
 		this.additionalPath = additionalPath;
 	}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/reactive/ReactiveCloudFoundrySecurityService.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -56,8 +56,8 @@ class ReactiveCloudFoundrySecurityService {
 
 	ReactiveCloudFoundrySecurityService(WebClient.Builder webClientBuilder, String cloudControllerUrl,
 			boolean skipSslValidation) {
-		Assert.notNull(webClientBuilder, "WebClient must not be null");
-		Assert.notNull(cloudControllerUrl, "CloudControllerUrl must not be null");
+		Assert.notNull(webClientBuilder, "'webClientBuilder' must not be null");
+		Assert.notNull(cloudControllerUrl, "'cloudControllerUrl' must not be null");
 		if (skipSslValidation) {
 			webClientBuilder.clientConnector(buildTrustAllSslConnector());
 		}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/servlet/CloudFoundrySecurityService.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -49,8 +49,8 @@ class CloudFoundrySecurityService {
 
 	CloudFoundrySecurityService(RestTemplateBuilder restTemplateBuilder, String cloudControllerUrl,
 			boolean skipSslValidation) {
-		Assert.notNull(restTemplateBuilder, "RestTemplateBuilder must not be null");
-		Assert.notNull(cloudControllerUrl, "CloudControllerUrl must not be null");
+		Assert.notNull(restTemplateBuilder, "'restTemplateBuilder' must not be null");
+		Assert.notNull(cloudControllerUrl, "'cloudControllerUrl' must not be null");
 		if (skipSslValidation) {
 			restTemplateBuilder = restTemplateBuilder.requestFactory(SkipSslVerificationHttpRequestFactory.class);
 		}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/endpoint/expose/IncludeExcludeEndpointFilter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -80,10 +80,10 @@ public class IncludeExcludeEndpointFilter<E extends ExposableEndpoint<?>> implem
 
 	private IncludeExcludeEndpointFilter(Class<E> endpointType, Environment environment, String prefix,
 			EndpointPatterns defaultIncludes) {
-		Assert.notNull(endpointType, "EndpointType must not be null");
-		Assert.notNull(environment, "Environment must not be null");
-		Assert.hasText(prefix, "Prefix must not be empty");
-		Assert.notNull(defaultIncludes, "DefaultIncludes must not be null");
+		Assert.notNull(endpointType, "'endpointType' must not be null");
+		Assert.notNull(environment, "'environment' must not be null");
+		Assert.hasText(prefix, "'prefix' must not be empty");
+		Assert.notNull(defaultIncludes, "'defaultIncludes' must not be null");
 		Binder binder = Binder.get(environment);
 		this.endpointType = endpointType;
 		this.include = new EndpointPatterns(bind(binder, prefix + ".include"));
@@ -93,8 +93,8 @@ public class IncludeExcludeEndpointFilter<E extends ExposableEndpoint<?>> implem
 
 	private IncludeExcludeEndpointFilter(Class<E> endpointType, Collection<String> include, Collection<String> exclude,
 			EndpointPatterns defaultIncludes) {
-		Assert.notNull(endpointType, "EndpointType Type must not be null");
-		Assert.notNull(defaultIncludes, "DefaultIncludes must not be null");
+		Assert.notNull(endpointType, "'endpointType' Type must not be null");
+		Assert.notNull(defaultIncludes, "'defaultIncludes' must not be null");
 		this.endpointType = endpointType;
 		this.include = new EndpointPatterns(include);
 		this.defaultIncludes = defaultIncludes;

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/WebEndpointProperties.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -62,7 +62,7 @@ public class WebEndpointProperties {
 	}
 
 	public void setBasePath(String basePath) {
-		Assert.isTrue(basePath.isEmpty() || basePath.startsWith("/"), "Base path must start with '/' or be empty");
+		Assert.isTrue(basePath.isEmpty() || basePath.startsWith("/"), "'basePath' must start with '/' or be empty");
 		this.basePath = cleanBasePath(basePath);
 	}
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/AbstractCompositeHealthContributorConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -47,7 +47,7 @@ public abstract class AbstractCompositeHealthContributorConfiguration<C, I exten
 	}
 
 	protected final C createContributor(Map<String, B> beans) {
-		Assert.notEmpty(beans, "Beans must not be empty");
+		Assert.notEmpty(beans, "'beans' must not be empty");
 		if (beans.size() == 1) {
 			return createIndicator(beans.values().iterator().next());
 		}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/jdbc/DataSourceHealthContributorAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -97,7 +97,7 @@ public class DataSourceHealthContributorAutoConfiguration implements Initializin
 	}
 
 	private HealthContributor createContributor(Map<String, DataSource> beans) {
-		Assert.notEmpty(beans, "Beans must not be empty");
+		Assert.notEmpty(beans, "'beans' must not be empty");
 		if (beans.size() == 1) {
 			return createContributor(beans.values().iterator().next());
 		}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/OnlyOnceLoggingDenyMeterFilter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -43,7 +43,7 @@ public final class OnlyOnceLoggingDenyMeterFilter implements MeterFilter {
 	private final Supplier<String> message;
 
 	public OnlyOnceLoggingDenyMeterFilter(Supplier<String> message) {
-		Assert.notNull(message, "Message must not be null");
+		Assert.notNull(message, "'message' must not be null");
 		this.message = message;
 	}
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/PropertiesMeterFilter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -51,7 +51,7 @@ public class PropertiesMeterFilter implements MeterFilter {
 	private final MeterFilter mapFilter;
 
 	public PropertiesMeterFilter(MetricsProperties properties) {
-		Assert.notNull(properties, "Properties must not be null");
+		Assert.notNull(properties, "'properties' must not be null");
 		this.properties = properties;
 		this.mapFilter = createMapFilter(properties.getTags());
 	}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/properties/PropertiesConfigAdapter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -38,7 +38,7 @@ public class PropertiesConfigAdapter<T> {
 	 * @param properties the source properties
 	 */
 	public PropertiesConfigAdapter(T properties) {
-		Assert.notNull(properties, "Properties must not be null");
+		Assert.notNull(properties, "'properties' must not be null");
 		this.properties = properties;
 	}
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/system/DiskSpaceHealthIndicatorProperties.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -56,7 +56,7 @@ public class DiskSpaceHealthIndicatorProperties {
 	}
 
 	public void setThreshold(DataSize threshold) {
-		Assert.isTrue(!threshold.isNegative(), "threshold must be greater than or equal to 0");
+		Assert.isTrue(!threshold.isNegative(), "'threshold' must be greater than or equal to 0");
 		this.threshold = threshold;
 	}
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/LocalBaggageFields.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,7 +37,7 @@ class LocalBaggageFields {
 	private final List<String> fields;
 
 	LocalBaggageFields(List<String> fields) {
-		Assert.notNull(fields, "fields must not be null");
+		Assert.notNull(fields, "'fields' must not be null");
 		this.fields = fields;
 	}
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/SpanExporters.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -68,7 +68,7 @@ public interface SpanExporters extends Iterable<SpanExporter> {
 	 * @return the constructed {@link SpanExporters} instance
 	 */
 	static SpanExporters of(Collection<? extends SpanExporter> spanExporters) {
-		Assert.notNull(spanExporters, "SpanExporters must not be null");
+		Assert.notNull(spanExporters, "'spanExporters' must not be null");
 		List<SpanExporter> copy = List.copyOf(spanExporters);
 		return () -> copy;
 	}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/SpanProcessors.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -68,7 +68,7 @@ public interface SpanProcessors extends Iterable<SpanProcessor> {
 	 * @return the constructed {@link SpanProcessors} instance
 	 */
 	static SpanProcessors of(Collection<? extends SpanProcessor> spanProcessors) {
-		Assert.notNull(spanProcessors, "SpanProcessors must not be null");
+		Assert.notNull(spanProcessors, "'spanProcessors' must not be null");
 		List<SpanProcessor> copy = List.copyOf(spanProcessors);
 		return () -> copy;
 	}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/web/servlet/ManagementErrorEndpoint.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -47,8 +47,8 @@ public class ManagementErrorEndpoint {
 	private final ErrorProperties errorProperties;
 
 	public ManagementErrorEndpoint(ErrorAttributes errorAttributes, ErrorProperties errorProperties) {
-		Assert.notNull(errorAttributes, "ErrorAttributes must not be null");
-		Assert.notNull(errorProperties, "ErrorProperties must not be null");
+		Assert.notNull(errorAttributes, "'errorAttributes' must not be null");
+		Assert.notNull(errorProperties, "'errorProperties' must not be null");
 		this.errorAttributes = errorAttributes;
 		this.errorProperties = errorProperties;
 	}

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/availability/AvailabilityProbesHealthEndpointGroupsTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -52,7 +52,7 @@ class AvailabilityProbesHealthEndpointGroupsTests {
 	@Test
 	void createWhenGroupsIsNullThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new AvailabilityProbesHealthEndpointGroups(null, false))
-			.withMessage("Groups must not be null");
+			.withMessage("'groups' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/endpoint/expose/IncludeExcludeEndpointFilterTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -45,28 +45,28 @@ class IncludeExcludeEndpointFilterTests {
 	void createWhenEndpointTypeIsNullShouldThrowException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new IncludeExcludeEndpointFilter<>(null, new MockEnvironment(), "foo"))
-			.withMessageContaining("EndpointType must not be null");
+			.withMessageContaining("'endpointType' must not be null");
 	}
 
 	@Test
 	void createWhenEnvironmentIsNullShouldThrowException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new IncludeExcludeEndpointFilter<>(ExposableEndpoint.class, null, "foo"))
-			.withMessageContaining("Environment must not be null");
+			.withMessageContaining("'environment' must not be null");
 	}
 
 	@Test
 	void createWhenPrefixIsNullShouldThrowException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new IncludeExcludeEndpointFilter<>(ExposableEndpoint.class, new MockEnvironment(), null))
-			.withMessageContaining("Prefix must not be empty");
+			.withMessageContaining("'prefix' must not be empty");
 	}
 
 	@Test
 	void createWhenPrefixIsEmptyShouldThrowException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new IncludeExcludeEndpointFilter<>(ExposableEndpoint.class, new MockEnvironment(), ""))
-			.withMessageContaining("Prefix must not be empty");
+			.withMessageContaining("'prefix' must not be empty");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/WebEndpointPropertiesTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -47,7 +47,7 @@ class WebEndpointPropertiesTests {
 	void basePathMustStartWithSlash() {
 		WebEndpointProperties properties = new WebEndpointProperties();
 		assertThatIllegalArgumentException().isThrownBy(() -> properties.setBasePath("admin"))
-			.withMessageContaining("Base path must start with '/' or be empty");
+			.withMessageContaining("'basePath' must start with '/' or be empty");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/health/AbstractCompositeHealthContributorConfigurationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -49,7 +49,7 @@ abstract class AbstractCompositeHealthContributorConfigurationTests<C, I extends
 	void createContributorWhenBeansIsEmptyThrowsException() {
 		Map<String, TestBean> beans = Collections.emptyMap();
 		assertThatIllegalArgumentException().isThrownBy(() -> newComposite().createContributor(beans))
-			.withMessage("Beans must not be empty");
+			.withMessage("'beans' must not be empty");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/metrics/PropertiesMeterFilterTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -48,7 +48,7 @@ class PropertiesMeterFilterTests {
 	@Test
 	void createWhenPropertiesIsNullShouldThrowException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new PropertiesMeterFilter(null))
-			.withMessageContaining("Properties must not be null");
+			.withMessageContaining("'properties' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/system/DiskSpaceHealthContributorAutoConfigurationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -49,7 +49,7 @@ class DiskSpaceHealthContributorAutoConfigurationTests {
 			.run((context) -> assertThat(context).hasFailed()
 				.getFailure()
 				.rootCause()
-				.hasMessage("threshold must be greater than or equal to 0"));
+				.hasMessage("'threshold' must be greater than or equal to 0"));
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/amqp/RabbitHealthIndicator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,7 +35,7 @@ public class RabbitHealthIndicator extends AbstractHealthIndicator {
 
 	public RabbitHealthIndicator(RabbitTemplate rabbitTemplate) {
 		super("Rabbit health check failed");
-		Assert.notNull(rabbitTemplate, "RabbitTemplate must not be null");
+		Assert.notNull(rabbitTemplate, "'rabbitTemplate' must not be null");
 		this.rabbitTemplate = rabbitTemplate;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/audit/AuditEvent.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -83,8 +83,8 @@ public class AuditEvent implements Serializable {
 	 * @param data the event data
 	 */
 	public AuditEvent(Instant timestamp, String principal, String type, Map<String, Object> data) {
-		Assert.notNull(timestamp, "Timestamp must not be null");
-		Assert.notNull(type, "Type must not be null");
+		Assert.notNull(timestamp, "'timestamp' must not be null");
+		Assert.notNull(type, "'type' must not be null");
 		this.timestamp = timestamp;
 		this.principal = (principal != null) ? principal : "";
 		this.type = type;

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/audit/AuditEventsEndpoint.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -38,7 +38,7 @@ public class AuditEventsEndpoint {
 	private final AuditEventRepository auditEventRepository;
 
 	public AuditEventsEndpoint(AuditEventRepository auditEventRepository) {
-		Assert.notNull(auditEventRepository, "AuditEventRepository must not be null");
+		Assert.notNull(auditEventRepository, "'auditEventRepository' must not be null");
 		this.auditEventRepository = auditEventRepository;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/audit/InMemoryAuditEventRepository.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -63,7 +63,7 @@ public class InMemoryAuditEventRepository implements AuditEventRepository {
 
 	@Override
 	public void add(AuditEvent event) {
-		Assert.notNull(event, "AuditEvent must not be null");
+		Assert.notNull(event, "'event' must not be null");
 		synchronized (this.monitor) {
 			this.tail = (this.tail + 1) % this.events.length;
 			this.events[this.tail] = event;

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/audit/listener/AuditApplicationEvent.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -77,7 +77,7 @@ public class AuditApplicationEvent extends ApplicationEvent {
 	 */
 	public AuditApplicationEvent(AuditEvent auditEvent) {
 		super(auditEvent);
-		Assert.notNull(auditEvent, "AuditEvent must not be null");
+		Assert.notNull(auditEvent, "'auditEvent' must not be null");
 		this.auditEvent = auditEvent;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/availability/AvailabilityStateHealthIndicator.java

@@ -55,9 +55,9 @@ public class AvailabilityStateHealthIndicator extends AbstractHealthIndicator {
 	public <S extends AvailabilityState> AvailabilityStateHealthIndicator(
 			ApplicationAvailability applicationAvailability, Class<S> stateType,
 			Consumer<StatusMappings<S>> statusMappings) {
-		Assert.notNull(applicationAvailability, "ApplicationAvailability must not be null");
-		Assert.notNull(stateType, "StateType must not be null");
-		Assert.notNull(statusMappings, "StatusMappings must not be null");
+		Assert.notNull(applicationAvailability, "'applicationAvailability' must not be null");
+		Assert.notNull(stateType, "'stateType' must not be null");
+		Assert.notNull(statusMappings, "'statusMappings' must not be null");
 		this.applicationAvailability = applicationAvailability;
 		this.stateType = stateType;
 		statusMappings.accept(this.statusMappings::put);

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/cassandra/CassandraDriverHealthIndicator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -47,7 +47,7 @@ public class CassandraDriverHealthIndicator extends AbstractHealthIndicator {
 	 */
 	public CassandraDriverHealthIndicator(CqlSession session) {
 		super("Cassandra health check failed");
-		Assert.notNull(session, "session must not be null");
+		Assert.notNull(session, "'session' must not be null");
 		this.session = session;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/cassandra/CassandraDriverReactiveHealthIndicator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -48,7 +48,7 @@ public class CassandraDriverReactiveHealthIndicator extends AbstractReactiveHeal
 	 */
 	public CassandraDriverReactiveHealthIndicator(CqlSession session) {
 		super("Cassandra health check failed");
-		Assert.notNull(session, "session must not be null");
+		Assert.notNull(session, "'session' must not be null");
 		this.session = session;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/couchbase/CouchbaseHealthIndicator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -42,7 +42,7 @@ public class CouchbaseHealthIndicator extends AbstractHealthIndicator {
 	 */
 	public CouchbaseHealthIndicator(Cluster cluster) {
 		super("Couchbase health check failed");
-		Assert.notNull(cluster, "Cluster must not be null");
+		Assert.notNull(cluster, "'cluster' must not be null");
 		this.cluster = cluster;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/data/mongo/MongoReactiveHealthIndicator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,7 +37,7 @@ public class MongoReactiveHealthIndicator extends AbstractReactiveHealthIndicato
 
 	public MongoReactiveHealthIndicator(ReactiveMongoTemplate reactiveMongoTemplate) {
 		super("Mongo health check failed");
-		Assert.notNull(reactiveMongoTemplate, "ReactiveMongoTemplate must not be null");
+		Assert.notNull(reactiveMongoTemplate, "'reactiveMongoTemplate' must not be null");
 		this.reactiveMongoTemplate = reactiveMongoTemplate;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/data/redis/RedisHealthIndicator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,7 +40,7 @@ public class RedisHealthIndicator extends AbstractHealthIndicator {
 
 	public RedisHealthIndicator(RedisConnectionFactory connectionFactory) {
 		super("Redis health check failed");
-		Assert.notNull(connectionFactory, "ConnectionFactory must not be null");
+		Assert.notNull(connectionFactory, "'connectionFactory' must not be null");
 		this.redisConnectionFactory = connectionFactory;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/AbstractExposableEndpoint.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -57,8 +57,8 @@ public abstract class AbstractExposableEndpoint<O extends Operation> implements
 	 * @since 3.4.0
 	 */
 	public AbstractExposableEndpoint(EndpointId id, Access defaultAccess, Collection<? extends O> operations) {
-		Assert.notNull(id, "ID must not be null");
-		Assert.notNull(operations, "Operations must not be null");
+		Assert.notNull(id, "'id' must not be null");
+		Assert.notNull(operations, "'operations' must not be null");
 		this.id = id;
 		this.defaultAccess = defaultAccess;
 		this.operations = List.copyOf(operations);

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/Access.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -47,7 +47,7 @@ public enum Access {
 	 * @return this access if less than the maximum or the maximum permitted
 	 */
 	public Access cap(Access maxPermitted) {
-		Assert.notNull(maxPermitted, "'maxPermittedAccess' must not be null");
+		Assert.notNull(maxPermitted, "'maxPermitted' must not be null");
 		return (ordinal() <= maxPermitted.ordinal()) ? this : maxPermitted;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/EndpointId.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -54,10 +54,10 @@ public final class EndpointId {
 	private final String lowerCaseAlphaNumeric;
 
 	private EndpointId(String value) {
-		Assert.hasText(value, "Value must not be empty");
-		Assert.isTrue(VALID_PATTERN.matcher(value).matches(), "Value must only contain valid chars");
-		Assert.isTrue(!Character.isDigit(value.charAt(0)), "Value must not start with a number");
-		Assert.isTrue(!Character.isUpperCase(value.charAt(0)), "Value must not start with an uppercase letter");
+		Assert.hasText(value, "'value' must not be empty");
+		Assert.isTrue(VALID_PATTERN.matcher(value).matches(), "'value' must only contain valid chars");
+		Assert.isTrue(!Character.isDigit(value.charAt(0)), "'value' must not start with a number");
+		Assert.isTrue(!Character.isUpperCase(value.charAt(0)), "'value' must not start with an uppercase letter");
 		if (WARNING_PATTERN.matcher(value).find()) {
 			logWarning(value);
 		}
@@ -125,7 +125,7 @@ public final class EndpointId {
 	 * @since 2.2.0
 	 */
 	public static EndpointId of(Environment environment, String value) {
-		Assert.notNull(environment, "Environment must not be null");
+		Assert.notNull(environment, "'environment' must not be null");
 		return new EndpointId(migrateLegacyId(environment, value));
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/InvocationContext.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -48,8 +48,8 @@ public class InvocationContext {
 	 */
 	public InvocationContext(SecurityContext securityContext, Map<String, Object> arguments,
 			OperationArgumentResolver... argumentResolvers) {
-		Assert.notNull(securityContext, "SecurityContext must not be null");
-		Assert.notNull(arguments, "Arguments must not be null");
+		Assert.notNull(securityContext, "'securityContext' must not be null");
+		Assert.notNull(arguments, "'arguments' must not be null");
 		this.arguments = arguments;
 		this.argumentResolvers = new ArrayList<>();
 		if (argumentResolvers != null) {

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/OperationArgumentResolver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -53,8 +53,8 @@ public interface OperationArgumentResolver {
 	 * @return an {@link OperationArgumentResolver} instance
 	 */
 	static <T> OperationArgumentResolver of(Class<T> type, Supplier<? extends T> supplier) {
-		Assert.notNull(type, "Type must not be null");
-		Assert.notNull(supplier, "Supplier must not be null");
+		Assert.notNull(type, "'type' must not be null");
+		Assert.notNull(supplier, "'supplier' must not be null");
 		return new OperationArgumentResolver() {
 
 			@Override

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/annotation/AbstractDiscoveredEndpoint.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -70,8 +70,8 @@ public abstract class AbstractDiscoveredEndpoint<O extends Operation> extends Ab
 	public AbstractDiscoveredEndpoint(EndpointDiscoverer<?, ?> discoverer, Object endpointBean, EndpointId id,
 			Access defaultAccess, Collection<? extends O> operations) {
 		super(id, defaultAccess, operations);
-		Assert.notNull(discoverer, "Discoverer must not be null");
-		Assert.notNull(endpointBean, "EndpointBean must not be null");
+		Assert.notNull(discoverer, "'discoverer' must not be null");
+		Assert.notNull(endpointBean, "'endpointBean' must not be null");
 		this.discoverer = discoverer;
 		this.endpointBean = endpointBean;
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/annotation/DiscoveredOperationMethod.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -41,7 +41,7 @@ public class DiscoveredOperationMethod extends OperationMethod {
 	public DiscoveredOperationMethod(Method method, OperationType operationType,
 			AnnotationAttributes annotationAttributes) {
 		super(method, operationType);
-		Assert.notNull(annotationAttributes, "AnnotationAttributes must not be null");
+		Assert.notNull(annotationAttributes, "'annotationAttributes' must not be null");
 		List<String> producesMediaTypes = new ArrayList<>();
 		producesMediaTypes.addAll(Arrays.asList(annotationAttributes.getStringArray("produces")));
 		producesMediaTypes.addAll(getProducesFromProducible(annotationAttributes));

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/annotation/DiscovererEndpointFilter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,7 +35,7 @@ public abstract class DiscovererEndpointFilter implements EndpointFilter<Discove
 	 * @param discoverer the required discoverer
 	 */
 	protected DiscovererEndpointFilter(Class<? extends EndpointDiscoverer<?, ?>> discoverer) {
-		Assert.notNull(discoverer, "Discoverer must not be null");
+		Assert.notNull(discoverer, "'discoverer' must not be null");
 		this.discoverer = discoverer;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/annotation/EndpointDiscoverer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -111,11 +111,11 @@ public abstract class EndpointDiscoverer<E extends ExposableEndpoint<O>, O exten
 	public EndpointDiscoverer(ApplicationContext applicationContext, ParameterValueMapper parameterValueMapper,
 			Collection<OperationInvokerAdvisor> invokerAdvisors, Collection<EndpointFilter<E>> endpointFilters,
 			Collection<OperationFilter<O>> operationFilters) {
-		Assert.notNull(applicationContext, "ApplicationContext must not be null");
-		Assert.notNull(parameterValueMapper, "ParameterValueMapper must not be null");
-		Assert.notNull(invokerAdvisors, "InvokerAdvisors must not be null");
-		Assert.notNull(endpointFilters, "EndpointFilters must not be null");
-		Assert.notNull(operationFilters, "OperationFilters must not be null");
+		Assert.notNull(applicationContext, "'applicationContext' must not be null");
+		Assert.notNull(parameterValueMapper, "'parameterValueMapper' must not be null");
+		Assert.notNull(invokerAdvisors, "'invokerAdvisors' must not be null");
+		Assert.notNull(endpointFilters, "'endpointFilters' must not be null");
+		Assert.notNull(operationFilters, "'operationFilters' must not be null");
 		this.applicationContext = applicationContext;
 		this.endpointFilters = Collections.unmodifiableCollection(endpointFilters);
 		this.operationFilters = Collections.unmodifiableCollection(operationFilters);
@@ -440,8 +440,8 @@ public abstract class EndpointDiscoverer<E extends ExposableEndpoint<O>, O exten
 		 * @param description a human-readable description of the key
 		 */
 		public OperationKey(Object key, Supplier<String> description) {
-			Assert.notNull(key, "Key must not be null");
-			Assert.notNull(description, "Description must not be null");
+			Assert.notNull(key, "'key' must not be null");
+			Assert.notNull(description, "'description' must not be null");
 			this.key = key;
 			this.description = description;
 		}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/invoke/convert/ConversionServiceParameterValueMapper.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -47,7 +47,7 @@ public class ConversionServiceParameterValueMapper implements ParameterValueMapp
 	 * @param conversionService the conversion service
 	 */
 	public ConversionServiceParameterValueMapper(ConversionService conversionService) {
-		Assert.notNull(conversionService, "ConversionService must not be null");
+		Assert.notNull(conversionService, "'conversionService' must not be null");
 		this.conversionService = conversionService;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/invoke/reflect/OperationMethod.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -48,8 +48,8 @@ public class OperationMethod {
 	 * @param operationType the operation type
 	 */
 	public OperationMethod(Method method, OperationType operationType) {
-		Assert.notNull(method, "Method must not be null");
-		Assert.notNull(operationType, "OperationType must not be null");
+		Assert.notNull(method, "'method' must not be null");
+		Assert.notNull(operationType, "'operationType' must not be null");
 		this.method = method;
 		this.operationType = operationType;
 		this.operationParameters = new OperationMethodParameters(method, DEFAULT_PARAMETER_NAME_DISCOVERER);

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/invoke/reflect/OperationMethodParameters.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -44,8 +44,8 @@ class OperationMethodParameters implements OperationParameters {
 	 * @param parameterNameDiscoverer the parameter name discoverer
 	 */
 	OperationMethodParameters(Method method, ParameterNameDiscoverer parameterNameDiscoverer) {
-		Assert.notNull(method, "Method must not be null");
-		Assert.notNull(parameterNameDiscoverer, "ParameterNameDiscoverer must not be null");
+		Assert.notNull(method, "'method' must not be null");
+		Assert.notNull(parameterNameDiscoverer, "'parameterNameDiscoverer' must not be null");
 		String[] parameterNames = parameterNameDiscoverer.getParameterNames(method);
 		Parameter[] parameters = method.getParameters();
 		Assert.state(parameterNames != null, () -> "Failed to extract parameter names for " + method);

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/invoke/reflect/ReflectiveOperationInvoker.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -56,9 +56,9 @@ public class ReflectiveOperationInvoker implements OperationInvoker {
 	 */
 	public ReflectiveOperationInvoker(Object target, OperationMethod operationMethod,
 			ParameterValueMapper parameterValueMapper) {
-		Assert.notNull(target, "Target must not be null");
-		Assert.notNull(operationMethod, "OperationMethod must not be null");
-		Assert.notNull(parameterValueMapper, "ParameterValueMapper must not be null");
+		Assert.notNull(target, "'target' must not be null");
+		Assert.notNull(operationMethod, "'operationMethod' must not be null");
+		Assert.notNull(parameterValueMapper, "'parameterValueMapper' must not be null");
 		ReflectionUtils.makeAccessible(operationMethod.getMethod());
 		this.target = target;
 		this.operationMethod = operationMethod;

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/invoker/cache/CachingOperationInvoker.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -65,7 +65,7 @@ public class CachingOperationInvoker implements OperationInvoker {
 	 * @param timeToLive the maximum time in milliseconds that a response can be cached
 	 */
 	CachingOperationInvoker(OperationInvoker invoker, long timeToLive) {
-		Assert.isTrue(timeToLive > 0, "TimeToLive must be strictly positive");
+		Assert.isTrue(timeToLive > 0, "'timeToLive' must be greater than zero");
 		this.invoker = invoker;
 		this.timeToLive = timeToLive;
 		this.cachedResponses = new ConcurrentReferenceHashMap<>();

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/jmx/EndpointMBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -63,8 +63,8 @@ public class EndpointMBean implements DynamicMBean {
 	private final Map<String, JmxOperation> operations;
 
 	EndpointMBean(JmxOperationResponseMapper responseMapper, ClassLoader classLoader, ExposableJmxEndpoint endpoint) {
-		Assert.notNull(responseMapper, "ResponseMapper must not be null");
-		Assert.notNull(endpoint, "Endpoint must not be null");
+		Assert.notNull(responseMapper, "'responseMapper' must not be null");
+		Assert.notNull(endpoint, "'endpoint' must not be null");
 		this.responseMapper = responseMapper;
 		this.classLoader = classLoader;
 		this.endpoint = endpoint;

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/jmx/JmxEndpointExporter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -61,10 +61,10 @@ public class JmxEndpointExporter implements InitializingBean, DisposableBean, Be
 
 	public JmxEndpointExporter(MBeanServer mBeanServer, EndpointObjectNameFactory objectNameFactory,
 			JmxOperationResponseMapper responseMapper, Collection<? extends ExposableJmxEndpoint> endpoints) {
-		Assert.notNull(mBeanServer, "MBeanServer must not be null");
-		Assert.notNull(objectNameFactory, "ObjectNameFactory must not be null");
-		Assert.notNull(responseMapper, "ResponseMapper must not be null");
-		Assert.notNull(endpoints, "Endpoints must not be null");
+		Assert.notNull(mBeanServer, "'mBeanServer' must not be null");
+		Assert.notNull(objectNameFactory, "'objectNameFactory' must not be null");
+		Assert.notNull(responseMapper, "'responseMapper' must not be null");
+		Assert.notNull(endpoints, "'endpoints' must not be null");
 		this.mBeanServer = mBeanServer;
 		this.objectNameFactory = objectNameFactory;
 		this.responseMapper = responseMapper;

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/EndpointMediaTypes.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -72,8 +72,8 @@ public class EndpointMediaTypes {
 	 * @param consumed the default media types that are consumed by an endpoint. Must not
 	 */
 	public EndpointMediaTypes(List<String> produced, List<String> consumed) {
-		Assert.notNull(produced, "Produced must not be null");
-		Assert.notNull(consumed, "Consumed must not be null");
+		Assert.notNull(produced, "'produced' must not be null");
+		Assert.notNull(consumed, "'consumed' must not be null");
 		this.produced = Collections.unmodifiableList(produced);
 		this.consumed = Collections.unmodifiableList(consumed);
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/EndpointServlet.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -49,7 +49,7 @@ public final class EndpointServlet {
 	}
 
 	private static Servlet instantiateClass(Class<? extends Servlet> servlet) {
-		Assert.notNull(servlet, "Servlet must not be null");
+		Assert.notNull(servlet, "'servlet' must not be null");
 		return BeanUtils.instantiateClass(servlet);
 	}
 
@@ -58,21 +58,21 @@ public final class EndpointServlet {
 	}
 
 	private EndpointServlet(Servlet servlet, Map<String, String> initParameters, int loadOnStartup) {
-		Assert.notNull(servlet, "Servlet must not be null");
+		Assert.notNull(servlet, "'servlet' must not be null");
 		this.servlet = servlet;
 		this.initParameters = Collections.unmodifiableMap(initParameters);
 		this.loadOnStartup = loadOnStartup;
 	}
 
 	public EndpointServlet withInitParameter(String name, String value) {
-		Assert.hasText(name, "Name must not be empty");
+		Assert.hasText(name, "'name' must not be empty");
 		return withInitParameters(Collections.singletonMap(name, value));
 	}
 
 	public EndpointServlet withInitParameters(Map<String, String> initParameters) {
-		Assert.notNull(initParameters, "InitParameters must not be null");
+		Assert.notNull(initParameters, "'initParameters' must not be null");
 		boolean hasEmptyName = initParameters.keySet().stream().anyMatch((name) -> !StringUtils.hasText(name));
-		Assert.isTrue(!hasEmptyName, "InitParameters must not contain empty names");
+		Assert.isTrue(!hasEmptyName, "'initParameters' must not contain empty names");
 		Map<String, String> mergedInitParameters = new LinkedHashMap<>(this.initParameters);
 		mergedInitParameters.putAll(initParameters);
 		return new EndpointServlet(this.servlet, mergedInitParameters, this.loadOnStartup);

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/Link.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -38,7 +38,7 @@ public class Link {
 	 * @param href the href
 	 */
 	public Link(String href) {
-		Assert.notNull(href, "HREF must not be null");
+		Assert.notNull(href, "'href' must not be null");
 		this.href = href;
 		this.templated = href.contains("{");
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/PathMappedEndpoints.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -47,7 +47,7 @@ public class PathMappedEndpoints implements Iterable<PathMappedEndpoint> {
 	 * @param supplier the endpoint supplier
 	 */
 	public PathMappedEndpoints(String basePath, EndpointsSupplier<?> supplier) {
-		Assert.notNull(supplier, "Supplier must not be null");
+		Assert.notNull(supplier, "'supplier' must not be null");
 		this.basePath = (basePath != null) ? basePath : "";
 		this.endpoints = getEndpoints(Collections.singleton(supplier));
 	}
@@ -58,7 +58,7 @@ public class PathMappedEndpoints implements Iterable<PathMappedEndpoint> {
 	 * @param suppliers the endpoint suppliers
 	 */
 	public PathMappedEndpoints(String basePath, Collection<EndpointsSupplier<?>> suppliers) {
-		Assert.notNull(suppliers, "Suppliers must not be null");
+		Assert.notNull(suppliers, "'suppliers' must not be null");
 		this.basePath = (basePath != null) ? basePath : "";
 		this.endpoints = getEndpoints(suppliers);
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/PathMapper.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -49,7 +49,7 @@ public interface PathMapper {
 	 * @return the path of the endpoint
 	 */
 	static String getRootPath(List<PathMapper> pathMappers, EndpointId endpointId) {
-		Assert.notNull(endpointId, "EndpointId must not be null");
+		Assert.notNull(endpointId, "'endpointId' must not be null");
 		if (pathMappers != null) {
 			for (PathMapper mapper : pathMappers) {
 				String path = mapper.getRootPath(endpointId);

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/ServletEndpointRegistrar.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -70,7 +70,7 @@ public class ServletEndpointRegistrar implements ServletContextInitializer {
 
 	public ServletEndpointRegistrar(String basePath, Collection<ExposableServletEndpoint> servletEndpoints,
 			EndpointAccessResolver endpointAccessResolver) {
-		Assert.notNull(servletEndpoints, "ServletEndpoints must not be null");
+		Assert.notNull(servletEndpoints, "'servletEndpoints' must not be null");
 		this.basePath = cleanBasePath(basePath);
 		this.servletEndpoints = servletEndpoints;
 		this.endpointAccessResolver = endpointAccessResolver;

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/annotation/RequestPredicateFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -47,7 +47,7 @@ class RequestPredicateFactory {
 	private final EndpointMediaTypes endpointMediaTypes;
 
 	RequestPredicateFactory(EndpointMediaTypes endpointMediaTypes) {
-		Assert.notNull(endpointMediaTypes, "EndpointMediaTypes must not be null");
+		Assert.notNull(endpointMediaTypes, "'endpointMediaTypes' must not be null");
 		this.endpointMediaTypes = endpointMediaTypes;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/reactive/ControllerEndpointHandlerMapping.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -87,8 +87,8 @@ public class ControllerEndpointHandlerMapping extends RequestMappingHandlerMappi
 	public ControllerEndpointHandlerMapping(EndpointMapping endpointMapping,
 			Collection<ExposableControllerEndpoint> endpoints, CorsConfiguration corsConfiguration,
 			EndpointAccessResolver endpointAccessResolver) {
-		Assert.notNull(endpointMapping, "EndpointMapping must not be null");
-		Assert.notNull(endpoints, "Endpoints must not be null");
+		Assert.notNull(endpointMapping, "'endpointMapping' must not be null");
+		Assert.notNull(endpoints, "'endpoints' must not be null");
 		this.endpointMapping = endpointMapping;
 		this.handlers = getHandlers(endpoints);
 		this.corsConfiguration = corsConfiguration;

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/servlet/ControllerEndpointHandlerMapping.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -88,8 +88,8 @@ public class ControllerEndpointHandlerMapping extends RequestMappingHandlerMappi
 	public ControllerEndpointHandlerMapping(EndpointMapping endpointMapping,
 			Collection<ExposableControllerEndpoint> endpoints, CorsConfiguration corsConfiguration,
 			EndpointAccessResolver endpointAccessResolver) {
-		Assert.notNull(endpointMapping, "EndpointMapping must not be null");
-		Assert.notNull(endpoints, "Endpoints must not be null");
+		Assert.notNull(endpointMapping, "'endpointMapping' must not be null");
+		Assert.notNull(endpoints, "'endpoints' must not be null");
 		this.endpointMapping = endpointMapping;
 		this.handlers = getHandlers(endpoints);
 		this.corsConfiguration = corsConfiguration;

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/hazelcast/HazelcastHealthIndicator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -36,7 +36,7 @@ public class HazelcastHealthIndicator extends AbstractHealthIndicator {
 
 	public HazelcastHealthIndicator(HazelcastInstance hazelcast) {
 		super("Hazelcast health check failed");
-		Assert.notNull(hazelcast, "HazelcastInstance must not be null");
+		Assert.notNull(hazelcast, "'hazelcast' must not be null");
 		this.hazelcast = hazelcast;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/AbstractHealthIndicator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -71,7 +71,7 @@ public abstract class AbstractHealthIndicator implements HealthIndicator {
 	 * @since 2.0.0
 	 */
 	protected AbstractHealthIndicator(Function<Exception, String> healthCheckFailedMessage) {
-		Assert.notNull(healthCheckFailedMessage, "HealthCheckFailedMessage must not be null");
+		Assert.notNull(healthCheckFailedMessage, "'healthCheckFailedMessage' must not be null");
 		this.healthCheckFailedMessage = healthCheckFailedMessage;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/AbstractReactiveHealthIndicator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -70,7 +70,7 @@ public abstract class AbstractReactiveHealthIndicator implements ReactiveHealthI
 	 * @since 2.1.7
 	 */
 	protected AbstractReactiveHealthIndicator(Function<Throwable, String> healthCheckFailedMessage) {
-		Assert.notNull(healthCheckFailedMessage, "HealthCheckFailedMessage must not be null");
+		Assert.notNull(healthCheckFailedMessage, "'healthCheckFailedMessage' must not be null");
 		this.healthCheckFailedMessage = healthCheckFailedMessage;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/AdditionalHealthEndpointPath.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -103,10 +103,10 @@ public final class AdditionalHealthEndpointPath {
 	 * @return the new instance
 	 */
 	public static AdditionalHealthEndpointPath from(String value) {
-		Assert.hasText(value, "Value must not be null");
+		Assert.hasText(value, "'value' must not be null");
 		String[] values = value.split(":");
-		Assert.isTrue(values.length == 2, "Value must contain a valid namespace and value separated by ':'.");
-		Assert.isTrue(StringUtils.hasText(values[0]), "Value must contain a valid namespace.");
+		Assert.isTrue(values.length == 2, "'value' must contain a valid namespace and value separated by ':'.");
+		Assert.isTrue(StringUtils.hasText(values[0]), "'value' must contain a valid namespace.");
 		WebServerNamespace namespace = WebServerNamespace.from(values[0]);
 		validateValue(values[1]);
 		return new AdditionalHealthEndpointPath(namespace, values[1]);
@@ -120,15 +120,15 @@ public final class AdditionalHealthEndpointPath {
 	 * @return the new instance
 	 */
 	public static AdditionalHealthEndpointPath of(WebServerNamespace webServerNamespace, String value) {
-		Assert.notNull(webServerNamespace, "The server namespace must not be null.");
-		Assert.notNull(value, "The value must not be null.");
+		Assert.notNull(webServerNamespace, "'webServerNamespace' must not be null.");
+		Assert.notNull(value, "'value' must not be null.");
 		validateValue(value);
 		return new AdditionalHealthEndpointPath(webServerNamespace, value);
 	}
 
 	private static void validateValue(String value) {
 		Assert.isTrue(StringUtils.countOccurrencesOf(value, "/") <= 1 && value.indexOf("/") <= 0,
-				"Value must contain only one segment.");
+				"'value' must contain only one segment.");
 	}
 
 }

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/CompositeHealth.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -44,7 +44,7 @@ public class CompositeHealth extends HealthComponent {
 	private final Map<String, HealthComponent> details;
 
 	CompositeHealth(ApiVersion apiVersion, Status status, Map<String, HealthComponent> components) {
-		Assert.notNull(status, "Status must not be null");
+		Assert.notNull(status, "'status' must not be null");
 		this.status = status;
 		this.components = (apiVersion != ApiVersion.V3) ? null : sort(components);
 		this.details = (apiVersion != ApiVersion.V2) ? null : sort(components);

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/CompositeHealthContributorReactiveAdapter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -33,7 +33,7 @@ class CompositeHealthContributorReactiveAdapter implements CompositeReactiveHeal
 	private final CompositeHealthContributor delegate;
 
 	CompositeHealthContributorReactiveAdapter(CompositeHealthContributor delegate) {
-		Assert.notNull(delegate, "Delegate must not be null");
+		Assert.notNull(delegate, "'delegate' must not be null");
 		this.delegate = delegate;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/DefaultContributorRegistry.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -50,8 +50,8 @@ class DefaultContributorRegistry<C> implements ContributorRegistry<C> {
 	}
 
 	DefaultContributorRegistry(Map<String, C> contributors, Function<String, String> nameFactory) {
-		Assert.notNull(contributors, "Contributors must not be null");
-		Assert.notNull(nameFactory, "NameFactory must not be null");
+		Assert.notNull(contributors, "'contributors' must not be null");
+		Assert.notNull(nameFactory, "'nameFactory' must not be null");
 		this.nameFactory = nameFactory;
 		Map<String, C> namedContributors = new LinkedHashMap<>();
 		contributors.forEach((name, contributor) -> namedContributors.put(nameFactory.apply(name), contributor));
@@ -60,8 +60,8 @@ class DefaultContributorRegistry<C> implements ContributorRegistry<C> {
 
 	@Override
 	public void registerContributor(String name, C contributor) {
-		Assert.notNull(name, "Name must not be null");
-		Assert.notNull(contributor, "Contributor must not be null");
+		Assert.notNull(name, "'name' must not be null");
+		Assert.notNull(contributor, "'contributor' must not be null");
 		String adaptedName = this.nameFactory.apply(name);
 		synchronized (this.monitor) {
 			Assert.state(!this.contributors.containsKey(adaptedName),
@@ -74,7 +74,7 @@ class DefaultContributorRegistry<C> implements ContributorRegistry<C> {
 
 	@Override
 	public C unregisterContributor(String name) {
-		Assert.notNull(name, "Name must not be null");
+		Assert.notNull(name, "'name' must not be null");
 		String adaptedName = this.nameFactory.apply(name);
 		synchronized (this.monitor) {
 			C unregistered = this.contributors.get(adaptedName);

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/Health.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -60,7 +60,7 @@ public final class Health extends HealthComponent {
 	 * @param builder the Builder to use
 	 */
 	private Health(Builder builder) {
-		Assert.notNull(builder, "Builder must not be null");
+		Assert.notNull(builder, "'builder' must not be null");
 		this.status = builder.status;
 		this.details = Collections.unmodifiableMap(builder.details);
 	}
@@ -207,7 +207,7 @@ public final class Health extends HealthComponent {
 		 * @param status the {@link Status} to use
 		 */
 		public Builder(Status status) {
-			Assert.notNull(status, "Status must not be null");
+			Assert.notNull(status, "'status' must not be null");
 			this.status = status;
 			this.details = new LinkedHashMap<>();
 		}
@@ -219,21 +219,21 @@ public final class Health extends HealthComponent {
 		 * @param details the details {@link Map} to use
 		 */
 		public Builder(Status status, Map<String, ?> details) {
-			Assert.notNull(status, "Status must not be null");
-			Assert.notNull(details, "Details must not be null");
+			Assert.notNull(status, "'status' must not be null");
+			Assert.notNull(details, "'details' must not be null");
 			this.status = status;
 			this.details = new LinkedHashMap<>(details);
 		}
 
 		/**
 		 * Record detail for given {@link Exception}.
-		 * @param ex the exception
+		 * @param exception the exception
 		 * @return this {@link Builder} instance
 		 */
-		public Builder withException(Throwable ex) {
-			Assert.notNull(ex, "Exception must not be null");
-			this.exception = ex;
-			return withDetail("error", ex.getClass().getName() + ": " + ex.getMessage());
+		public Builder withException(Throwable exception) {
+			Assert.notNull(exception, "'exception' must not be null");
+			this.exception = exception;
+			return withDetail("error", exception.getClass().getName() + ": " + exception.getMessage());
 		}
 
 		/**
@@ -243,8 +243,8 @@ public final class Health extends HealthComponent {
 		 * @return this {@link Builder} instance
 		 */
 		public Builder withDetail(String key, Object value) {
-			Assert.notNull(key, "Key must not be null");
-			Assert.notNull(value, "Value must not be null");
+			Assert.notNull(key, "'key' must not be null");
+			Assert.notNull(value, "'value' must not be null");
 			this.details.put(key, value);
 			return this;
 		}
@@ -257,7 +257,7 @@ public final class Health extends HealthComponent {
 		 * @since 2.1.0
 		 */
 		public Builder withDetails(Map<String, ?> details) {
-			Assert.notNull(details, "Details must not be null");
+			Assert.notNull(details, "'details' must not be null");
 			this.details.putAll(details);
 			return this;
 		}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthEndpointGroups.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -58,7 +58,7 @@ public interface HealthEndpointGroups {
 	 * @since 2.6.0
 	 */
 	default HealthEndpointGroup get(AdditionalHealthEndpointPath path) {
-		Assert.notNull(path, "Path must not be null");
+		Assert.notNull(path, "'path' must not be null");
 		for (String name : getNames()) {
 			HealthEndpointGroup group = get(name);
 			if (path.equals(group.getAdditionalPath())) {
@@ -76,7 +76,7 @@ public interface HealthEndpointGroups {
 	 * @since 2.6.0
 	 */
 	default Set<HealthEndpointGroup> getAllWithAdditionalPath(WebServerNamespace namespace) {
-		Assert.notNull(namespace, "Namespace must not be null");
+		Assert.notNull(namespace, "'namespace' must not be null");
 		Set<HealthEndpointGroup> filteredGroups = new LinkedHashSet<>();
 		getNames().stream()
 			.map(this::get)
@@ -92,8 +92,8 @@ public interface HealthEndpointGroups {
 	 * @return a new {@link HealthEndpointGroups} instance
 	 */
 	static HealthEndpointGroups of(HealthEndpointGroup primary, Map<String, HealthEndpointGroup> additional) {
-		Assert.notNull(primary, "Primary must not be null");
-		Assert.notNull(additional, "Additional must not be null");
+		Assert.notNull(primary, "'primary' must not be null");
+		Assert.notNull(additional, "'additional' must not be null");
 		return new HealthEndpointGroups() {
 
 			@Override

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthEndpointSupport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -63,8 +63,8 @@ abstract class HealthEndpointSupport<C, T> {
 	 */
 	HealthEndpointSupport(ContributorRegistry<C> registry, HealthEndpointGroups groups,
 			Duration slowIndicatorLoggingThreshold) {
-		Assert.notNull(registry, "Registry must not be null");
-		Assert.notNull(groups, "Groups must not be null");
+		Assert.notNull(registry, "'registry' must not be null");
+		Assert.notNull(groups, "'groups' must not be null");
 		this.registry = registry;
 		this.groups = groups;
 		this.slowIndicatorLoggingThreshold = slowIndicatorLoggingThreshold;

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthIndicatorReactiveAdapter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -32,7 +32,7 @@ class HealthIndicatorReactiveAdapter implements ReactiveHealthIndicator {
 	private final HealthIndicator delegate;
 
 	HealthIndicatorReactiveAdapter(HealthIndicator delegate) {
-		Assert.notNull(delegate, "Delegate must not be null");
+		Assert.notNull(delegate, "'delegate' must not be null");
 		this.delegate = delegate;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/NamedContributor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -42,8 +42,8 @@ public interface NamedContributor<C> {
 	C getContributor();
 
 	static <C> NamedContributor<C> of(String name, C contributor) {
-		Assert.notNull(name, "Name must not be null");
-		Assert.notNull(contributor, "Contributor must not be null");
+		Assert.notNull(name, "'name' must not be null");
+		Assert.notNull(contributor, "'contributor' must not be null");
 		return new NamedContributor<>() {
 
 			@Override

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/NamedContributorsMapAdapter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,24 +40,25 @@ abstract class NamedContributorsMapAdapter<V, C> implements NamedContributors<C>
 	private final Map<String, C> map;
 
 	NamedContributorsMapAdapter(Map<String, V> map, Function<V, ? extends C> valueAdapter) {
-		Assert.notNull(map, "Map must not be null");
-		Assert.notNull(valueAdapter, "ValueAdapter must not be null");
-		map.keySet().forEach(this::validateKey);
-		this.map = Collections.unmodifiableMap(map.entrySet()
-			.stream()
-			.collect(LinkedHashMap::new,
-					(result, entry) -> result.put(entry.getKey(), adapt(entry.getValue(), valueAdapter)), Map::putAll));
+		Assert.notNull(map, "'map' must not be null");
+		Assert.notNull(valueAdapter, "'valueAdapter' must not be null");
+		map.keySet().forEach(this::validateMapKey);
+		this.map = Collections.unmodifiableMap(map.entrySet().stream().collect(LinkedHashMap::new, (result, entry) -> {
+			String key = entry.getKey();
+			C value = adaptMapValue(entry.getValue(), valueAdapter);
+			result.put(key, value);
+		}, Map::putAll));
 
 	}
 
-	private void validateKey(String value) {
-		Assert.notNull(value, "Map must not contain null keys");
-		Assert.isTrue(!value.contains("/"), "Map keys must not contain a '/'");
+	private void validateMapKey(String value) {
+		Assert.notNull(value, "'map' must not contain null keys");
+		Assert.isTrue(!value.contains("/"), "'map' keys must not contain a '/'");
 	}
 
-	private C adapt(V value, Function<V, ? extends C> valueAdapter) {
+	private C adaptMapValue(V value, Function<V, ? extends C> valueAdapter) {
 		C contributor = (value != null) ? valueAdapter.apply(value) : null;
-		Assert.notNull(contributor, "Map must not contain null values");
+		Assert.notNull(contributor, "'map' must not contain null values");
 		return contributor;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/ReactiveHealthContributor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -32,7 +32,7 @@ import org.springframework.util.Assert;
 public interface ReactiveHealthContributor {
 
 	static ReactiveHealthContributor adapt(HealthContributor healthContributor) {
-		Assert.notNull(healthContributor, "HealthContributor must not be null");
+		Assert.notNull(healthContributor, "'healthContributor' must not be null");
 		if (healthContributor instanceof HealthIndicator healthIndicator) {
 			return new HealthIndicatorReactiveAdapter(healthIndicator);
 		}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/Status.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -78,8 +78,8 @@ public final class Status {
 	 * @param description a description of the status
 	 */
 	public Status(String code, String description) {
-		Assert.notNull(code, "Code must not be null");
-		Assert.notNull(description, "Description must not be null");
+		Assert.notNull(code, "'code' must not be null");
+		Assert.notNull(description, "'description' must not be null");
 		this.code = code;
 		this.description = description;
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/info/InfoEndpoint.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -42,7 +42,7 @@ public class InfoEndpoint {
 	 * @param infoContributors the info contributors to use
 	 */
 	public InfoEndpoint(List<InfoContributor> infoContributors) {
-		Assert.notNull(infoContributors, "Info contributors must not be null");
+		Assert.notNull(infoContributors, "'infoContributors' must not be null");
 		this.infoContributors = infoContributors;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/info/SimpleInfoContributor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,7 +31,7 @@ public class SimpleInfoContributor implements InfoContributor {
 	private final Object detail;
 
 	public SimpleInfoContributor(String prefix, Object detail) {
-		Assert.notNull(prefix, "Prefix must not be null");
+		Assert.notNull(prefix, "'prefix' must not be null");
 		this.prefix = prefix;
 		this.detail = detail;
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/ldap/LdapHealthIndicator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -41,7 +41,7 @@ public class LdapHealthIndicator extends AbstractHealthIndicator {
 
 	public LdapHealthIndicator(LdapOperations ldapOperations) {
 		super("LDAP health check failed");
-		Assert.notNull(ldapOperations, "LdapOperations must not be null");
+		Assert.notNull(ldapOperations, "'ldapOperations' must not be null");
 		this.ldapOperations = ldapOperations;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/liquibase/LiquibaseEndpoint.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -51,7 +51,7 @@ public class LiquibaseEndpoint {
 	private final ApplicationContext context;
 
 	public LiquibaseEndpoint(ApplicationContext context) {
-		Assert.notNull(context, "Context must be specified");
+		Assert.notNull(context, "'context' must be specified");
 		this.context = context;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/logging/LoggersEndpoint.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -64,8 +64,8 @@ public class LoggersEndpoint {
 	 * @param loggerGroups the logger group to expose
 	 */
 	public LoggersEndpoint(LoggingSystem loggingSystem, LoggerGroups loggerGroups) {
-		Assert.notNull(loggingSystem, "LoggingSystem must not be null");
-		Assert.notNull(loggerGroups, "LoggerGroups must not be null");
+		Assert.notNull(loggingSystem, "'loggingSystem' must not be null");
+		Assert.notNull(loggerGroups, "'loggerGroups' must not be null");
 		this.loggingSystem = loggingSystem;
 		this.loggerGroups = loggerGroups;
 	}
@@ -88,7 +88,7 @@ public class LoggersEndpoint {
 
 	@ReadOperation
 	public LoggerLevelsDescriptor loggerLevels(@Selector String name) {
-		Assert.notNull(name, "Name must not be null");
+		Assert.notNull(name, "'name' must not be null");
 		LoggerGroup group = this.loggerGroups.get(name);
 		if (group != null) {
 			return new GroupLoggerLevelsDescriptor(group.getConfiguredLevel(), group.getMembers());
@@ -99,7 +99,7 @@ public class LoggersEndpoint {
 
 	@WriteOperation
 	public void configureLogLevel(@Selector String name, @Nullable LogLevel configuredLevel) {
-		Assert.notNull(name, "Name must not be empty");
+		Assert.notNull(name, "'name' must not be empty");
 		LoggerGroup group = this.loggerGroups.get(name);
 		if (group != null && group.hasMembers()) {
 			group.configureLogLevel(configuredLevel, this.loggingSystem::setLogLevel);

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/amqp/RabbitMetrics.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -45,7 +45,7 @@ public class RabbitMetrics implements MeterBinder {
 	 * @param tags tags to apply to all recorded metrics
 	 */
 	public RabbitMetrics(ConnectionFactory connectionFactory, Iterable<Tag> tags) {
-		Assert.notNull(connectionFactory, "ConnectionFactory must not be null");
+		Assert.notNull(connectionFactory, "'connectionFactory' must not be null");
 		this.connectionFactory = connectionFactory;
 		this.tags = (tags != null) ? tags : Collections.emptyList();
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/export/prometheus/PrometheusPushGatewayManager.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -87,11 +87,11 @@ public class PrometheusPushGatewayManager {
 	 */
 	public PrometheusPushGatewayManager(PushGateway pushGateway, CollectorRegistry registry, TaskScheduler scheduler,
 			Duration pushRate, String job, Map<String, String> groupingKey, ShutdownOperation shutdownOperation) {
-		Assert.notNull(pushGateway, "PushGateway must not be null");
-		Assert.notNull(registry, "Registry must not be null");
-		Assert.notNull(scheduler, "Scheduler must not be null");
-		Assert.notNull(pushRate, "PushRate must not be null");
-		Assert.hasLength(job, "Job must not be empty");
+		Assert.notNull(pushGateway, "'pushGateway' must not be null");
+		Assert.notNull(registry, "'registry' must not be null");
+		Assert.notNull(scheduler, "'scheduler' must not be null");
+		Assert.notNull(pushRate, "'pushRate' must not be null");
+		Assert.hasLength(job, "'job' must not be empty");
 		this.pushGateway = pushGateway;
 		this.registry = registry;
 		this.job = job;

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/jdbc/DataSourcePoolMetrics.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -56,8 +56,8 @@ public class DataSourcePoolMetrics implements MeterBinder {
 
 	public DataSourcePoolMetrics(DataSource dataSource, DataSourcePoolMetadataProvider metadataProvider, String name,
 			Iterable<Tag> tags) {
-		Assert.notNull(dataSource, "DataSource must not be null");
-		Assert.notNull(metadataProvider, "MetadataProvider must not be null");
+		Assert.notNull(dataSource, "'dataSource' must not be null");
+		Assert.notNull(metadataProvider, "'metadataProvider' must not be null");
 		this.dataSource = dataSource;
 		this.metadataProvider = new CachingDataSourcePoolMetadataProvider(metadataProvider);
 		this.tags = Tags.concat(tags, "name", name);

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/system/DiskSpaceMetricsBinder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -39,7 +39,7 @@ public class DiskSpaceMetricsBinder implements MeterBinder {
 	private final Iterable<Tag> tags;
 
 	public DiskSpaceMetricsBinder(List<File> paths, Iterable<Tag> tags) {
-		Assert.notEmpty(paths, "Paths must not be empty");
+		Assert.notEmpty(paths, "'paths' must not be empty");
 		this.paths = paths;
 		this.tags = tags;
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/web/client/ObservationRestClientCustomizer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -43,8 +43,8 @@ public class ObservationRestClientCustomizer implements RestClientCustomizer {
 	 */
 	public ObservationRestClientCustomizer(ObservationRegistry observationRegistry,
 			ClientRequestObservationConvention observationConvention) {
-		Assert.notNull(observationConvention, "ObservationConvention must not be null");
-		Assert.notNull(observationRegistry, "ObservationRegistry must not be null");
+		Assert.notNull(observationConvention, "'observationConvention' must not be null");
+		Assert.notNull(observationRegistry, "'observationRegistry' must not be null");
 		this.observationRegistry = observationRegistry;
 		this.observationConvention = observationConvention;
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/quartz/QuartzEndpoint.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -75,7 +75,7 @@ public class QuartzEndpoint {
 	private final Sanitizer sanitizer;
 
 	public QuartzEndpoint(Scheduler scheduler, Iterable<SanitizingFunction> sanitizingFunctions) {
-		Assert.notNull(scheduler, "Scheduler must not be null");
+		Assert.notNull(scheduler, "'scheduler' must not be null");
 		this.scheduler = scheduler;
 		this.sanitizer = new Sanitizer(sanitizingFunctions);
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/r2dbc/ConnectionFactoryHealthIndicator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -63,7 +63,7 @@ public class ConnectionFactoryHealthIndicator extends AbstractReactiveHealthIndi
 	 * validation
 	 */
 	public ConnectionFactoryHealthIndicator(ConnectionFactory connectionFactory, String validationQuery) {
-		Assert.notNull(connectionFactory, "ConnectionFactory must not be null");
+		Assert.notNull(connectionFactory, "'connectionFactory' must not be null");
 		this.connectionFactory = connectionFactory;
 		this.validationQuery = validationQuery;
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/session/ReactiveSessionsEndpoint.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -50,7 +50,7 @@ public class ReactiveSessionsEndpoint {
 	 */
 	public ReactiveSessionsEndpoint(ReactiveSessionRepository<? extends Session> sessionRepository,
 			ReactiveFindByIndexNameSessionRepository<? extends Session> indexedSessionRepository) {
-		Assert.notNull(sessionRepository, "ReactiveSessionRepository must not be null");
+		Assert.notNull(sessionRepository, "'sessionRepository' must not be null");
 		this.sessionRepository = sessionRepository;
 		this.indexedSessionRepository = indexedSessionRepository;
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/session/SessionsEndpoint.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -61,7 +61,7 @@ public class SessionsEndpoint {
 	 */
 	public SessionsEndpoint(SessionRepository<? extends Session> sessionRepository,
 			FindByIndexNameSessionRepository<? extends Session> indexedSessionRepository) {
-		Assert.notNull(sessionRepository, "SessionRepository must not be null");
+		Assert.notNull(sessionRepository, "'sessionRepository' must not be null");
 		this.sessionRepository = sessionRepository;
 		this.indexedSessionRepository = indexedSessionRepository;
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/web/exchanges/HttpExchangesEndpoint.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,7 +40,7 @@ public class HttpExchangesEndpoint {
 	 * @param repository the exchange repository
 	 */
 	public HttpExchangesEndpoint(HttpExchangeRepository repository) {
-		Assert.notNull(repository, "Repository must not be null");
+		Assert.notNull(repository, "'repository' must not be null");
 		this.repository = repository;
 	}
 

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/amqp/RabbitHealthIndicatorTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -53,7 +53,7 @@ class RabbitHealthIndicatorTests {
 	@Test
 	void createWhenRabbitTemplateIsNullShouldThrowException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new RabbitHealthIndicator(null))
-			.withMessageContaining("RabbitTemplate must not be null");
+			.withMessageContaining("'rabbitTemplate' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/audit/AuditEventTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -60,14 +60,14 @@ class AuditEventTests {
 	void nullTimestamp() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new AuditEvent(null, "phil", "UNKNOWN", Collections.singletonMap("a", "b")))
-			.withMessageContaining("Timestamp must not be null");
+			.withMessageContaining("'timestamp' must not be null");
 	}
 
 	@Test
 	void nullType() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new AuditEvent("phil", null, Collections.singletonMap("a", "b")))
-			.withMessageContaining("Type must not be null");
+			.withMessageContaining("'type' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/audit/InMemoryAuditEventRepositoryTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -63,7 +63,7 @@ class InMemoryAuditEventRepositoryTests {
 	void addNullAuditEvent() {
 		InMemoryAuditEventRepository repository = new InMemoryAuditEventRepository();
 		assertThatIllegalArgumentException().isThrownBy(() -> repository.add(null))
-			.withMessageContaining("AuditEvent must not be null");
+			.withMessageContaining("'event' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/availability/AvailabilityStateHealthIndicatorTests.java

@@ -47,7 +47,7 @@ class AvailabilityStateHealthIndicatorTests {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new AvailabilityStateHealthIndicator(null, LivenessState.class, (statusMappings) -> {
 			}))
-			.withMessage("ApplicationAvailability must not be null");
+			.withMessage("'applicationAvailability' must not be null");
 	}
 
 	@Test
@@ -55,7 +55,7 @@ class AvailabilityStateHealthIndicatorTests {
 		assertThatIllegalArgumentException().isThrownBy(
 				() -> new AvailabilityStateHealthIndicator(this.applicationAvailability, null, (statusMappings) -> {
 				}))
-			.withMessage("StateType must not be null");
+			.withMessage("'stateType' must not be null");
 	}
 
 	@Test
@@ -63,7 +63,7 @@ class AvailabilityStateHealthIndicatorTests {
 		assertThatIllegalArgumentException()
 			.isThrownBy(
 					() -> new AvailabilityStateHealthIndicator(this.applicationAvailability, LivenessState.class, null))
-			.withMessage("StatusMappings must not be null");
+			.withMessage("'statusMappings' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/EndpointIdTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,42 +37,43 @@ class EndpointIdTests {
 	@Test
 	void ofWhenNullThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> EndpointId.of(null))
-			.withMessage("Value must not be empty");
+			.withMessage("'value' must not be empty");
 	}
 
 	@Test
 	void ofWhenEmptyThrowsException() {
-		assertThatIllegalArgumentException().isThrownBy(() -> EndpointId.of("")).withMessage("Value must not be empty");
+		assertThatIllegalArgumentException().isThrownBy(() -> EndpointId.of(""))
+			.withMessage("'value' must not be empty");
 	}
 
 	@Test
 	void ofWhenContainsSlashThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> EndpointId.of("foo/bar"))
-			.withMessage("Value must only contain valid chars");
+			.withMessage("'value' must only contain valid chars");
 	}
 
 	@Test
 	void ofWhenContainsBackslashThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> EndpointId.of("foo\\bar"))
-			.withMessage("Value must only contain valid chars");
+			.withMessage("'value' must only contain valid chars");
 	}
 
 	@Test
 	void ofWhenHasBadCharThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> EndpointId.of("foo!bar"))
-			.withMessage("Value must only contain valid chars");
+			.withMessage("'value' must only contain valid chars");
 	}
 
 	@Test
 	void ofWhenStartsWithNumberThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> EndpointId.of("1foo"))
-			.withMessage("Value must not start with a number");
+			.withMessage("'value' must not start with a number");
 	}
 
 	@Test
 	void ofWhenStartsWithUppercaseLetterThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> EndpointId.of("Foo"))
-			.withMessage("Value must not start with an uppercase letter");
+			.withMessage("'value' must not start with an uppercase letter");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/InvocationContextTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -45,13 +45,13 @@ class InvocationContextTests {
 	@Test
 	void createWhenSecurityContextIsNullThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new InvocationContext(null, this.arguments))
-			.withMessage("SecurityContext must not be null");
+			.withMessage("'securityContext' must not be null");
 	}
 
 	@Test
 	void createWhenArgumentsIsNullThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new InvocationContext(this.securityContext, null))
-			.withMessage("Arguments must not be null");
+			.withMessage("'arguments' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/annotation/DiscoveredOperationMethodTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -42,7 +42,7 @@ class DiscoveredOperationMethodTests {
 		Method method = ReflectionUtils.findMethod(getClass(), "example");
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new DiscoveredOperationMethod(method, OperationType.READ, null))
-			.withMessageContaining("AnnotationAttributes must not be null");
+			.withMessageContaining("'annotationAttributes' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/annotation/DiscovererEndpointFilterTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -43,7 +43,7 @@ class DiscovererEndpointFilterTests {
 	@Test
 	void createWhenDiscovererIsNullShouldThrowException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new TestDiscovererEndpointFilter(null))
-			.withMessageContaining("Discoverer must not be null");
+			.withMessageContaining("'discoverer' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/annotation/EndpointDiscovererTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -76,7 +76,7 @@ class EndpointDiscovererTests {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new TestEndpointDiscoverer(null, mock(ParameterValueMapper.class),
 					Collections.emptyList(), Collections.emptyList()))
-			.withMessageContaining("ApplicationContext must not be null");
+			.withMessageContaining("'applicationContext' must not be null");
 	}
 
 	@Test
@@ -84,7 +84,7 @@ class EndpointDiscovererTests {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new TestEndpointDiscoverer(mock(ApplicationContext.class), null, Collections.emptyList(),
 					Collections.emptyList()))
-			.withMessageContaining("ParameterValueMapper must not be null");
+			.withMessageContaining("'parameterValueMapper' must not be null");
 	}
 
 	@Test
@@ -92,7 +92,7 @@ class EndpointDiscovererTests {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new TestEndpointDiscoverer(mock(ApplicationContext.class),
 					mock(ParameterValueMapper.class), null, Collections.emptyList()))
-			.withMessageContaining("InvokerAdvisors must not be null");
+			.withMessageContaining("'invokerAdvisors' must not be null");
 	}
 
 	@Test
@@ -100,7 +100,7 @@ class EndpointDiscovererTests {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new TestEndpointDiscoverer(mock(ApplicationContext.class),
 					mock(ParameterValueMapper.class), Collections.emptyList(), null))
-			.withMessageContaining("Filters must not be null");
+			.withMessageContaining("'endpointFilters' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/invoke/reflect/OperationMethodParametersTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -51,13 +51,13 @@ class OperationMethodParametersTests {
 	void createWhenMethodIsNullShouldThrowException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new OperationMethodParameters(null, mock(ParameterNameDiscoverer.class)))
-			.withMessageContaining("Method must not be null");
+			.withMessageContaining("'method' must not be null");
 	}
 
 	@Test
 	void createWhenParameterNameDiscovererIsNullShouldThrowException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new OperationMethodParameters(this.exampleMethod, null))
-			.withMessageContaining("ParameterNameDiscoverer must not be null");
+			.withMessageContaining("'parameterNameDiscoverer' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/invoke/reflect/OperationMethodTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -39,13 +39,13 @@ class OperationMethodTests {
 	@Test
 	void createWhenMethodIsNullShouldThrowException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new OperationMethod(null, OperationType.READ))
-			.withMessageContaining("Method must not be null");
+			.withMessageContaining("'method' must not be null");
 	}
 
 	@Test
 	void createWhenOperationTypeIsNullShouldThrowException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new OperationMethod(this.exampleMethod, null))
-			.withMessageContaining("OperationType must not be null");
+			.withMessageContaining("'operationType' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/invoke/reflect/ReflectiveOperationInvokerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -60,21 +60,21 @@ class ReflectiveOperationInvokerTests {
 	void createWhenTargetIsNullShouldThrowException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new ReflectiveOperationInvoker(null, this.operationMethod, this.parameterValueMapper))
-			.withMessageContaining("Target must not be null");
+			.withMessageContaining("'target' must not be null");
 	}
 
 	@Test
 	void createWhenOperationMethodIsNullShouldThrowException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new ReflectiveOperationInvoker(this.target, null, this.parameterValueMapper))
-			.withMessageContaining("OperationMethod must not be null");
+			.withMessageContaining("'operationMethod' must not be null");
 	}
 
 	@Test
 	void createWhenParameterValueMapperIsNullShouldThrowException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new ReflectiveOperationInvoker(this.target, this.operationMethod, null))
-			.withMessageContaining("ParameterValueMapper must not be null");
+			.withMessageContaining("'parameterValueMapper' must not be null");
 	}
 
 	@Test