Polish

See gh-46505

Signed-off-by: Johnny Lim <izeye@naver.com>

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/RabbitTemplateConfigurer.java

@@ -33,7 +33,7 @@ import org.springframework.util.CollectionUtils;
  * properties.
  * <p>
  * Can be injected into application code and used to define a custom
- * {@code RabbitTemplateConfigurer} whose configuration is based upon that produced by
+ * {@code RabbitTemplate} whose configuration is based upon that produced by
  * auto-configuration.
  *
  * @author Stephane Nicoll

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/bind/CollectionBinderTests.java

@@ -116,11 +116,11 @@ class CollectionBinderTests {
 			.satisfies((ex) -> {
 				Set<ConfigurationProperty> unbound = ((UnboundConfigurationPropertiesException) ex.getCause())
 					.getUnboundProperties();
-				assertThat(unbound).hasSize(1);
-				ConfigurationProperty property = unbound.iterator().next();
+				assertThat(unbound).singleElement().satisfies((property) -> {
 					assertThat(property.getName()).hasToString("foo[3]");
 					assertThat(property.getValue()).isEqualTo("3");
 				});
+			});
 	}
 
 	@Test
@@ -136,11 +136,11 @@ class CollectionBinderTests {
 			.satisfies((ex) -> {
 				Set<ConfigurationProperty> unbound = ((UnboundConfigurationPropertiesException) ex.getCause())
 					.getUnboundProperties();
-				assertThat(unbound).hasSize(1);
-				ConfigurationProperty property = unbound.iterator().next();
+				assertThat(unbound).singleElement().satisfies((property) -> {
 					assertThat(property.getName()).hasToString("foo[1].missing");
 					assertThat(property.getValue()).isEqualTo("bad");
 				});
+			});
 	}
 
 	@Test
@@ -152,10 +152,10 @@ class CollectionBinderTests {
 		source.put("foo[0].string", "test");
 		this.sources.add(source);
 		List<ExampleCollectionBean> list = this.binder.bind("foo", Bindable.listOf(ExampleCollectionBean.class)).get();
-		assertThat(list).hasSize(1);
-		ExampleCollectionBean bean = list.get(0);
+		assertThat(list).singleElement().satisfies((bean) -> {
 			assertThat(bean.getItems()).containsExactly("a", "b", "d");
 			assertThat(bean.getString()).isEqualTo("test");
+		});
 	}
 
 	@Test
@@ -170,11 +170,11 @@ class CollectionBinderTests {
 			.satisfies((ex) -> {
 				Set<ConfigurationProperty> unbound = ((UnboundConfigurationPropertiesException) ex.getCause())
 					.getUnboundProperties();
-				assertThat(unbound).hasSize(1);
-				ConfigurationProperty property = unbound.iterator().next();
+				assertThat(unbound).singleElement().satisfies((property) -> {
 					assertThat(property.getName()).hasToString("foo[4].value");
 					assertThat(property.getValue()).isEqualTo("4");
 				});
+			});
 	}
 
 	@Test