Fix typos in Javadoc, reference docs, and code

Closes gh-28822

spring-context-indexer/src/main/java/org/springframework/context/index/processor/TypeHelper.java

@@ -81,7 +81,7 @@ class TypeHelper {
 	}
 
 	/**
-	 * Return the super class of the specified {@link Element} or null if this
+	 * Return the superclass of the specified {@link Element} or null if this
 	 * {@code element} represents {@link Object}.
 	 */
 	public Element getSuperClass(Element element) {

spring-core/src/main/java/org/springframework/asm/Type.java

@@ -708,8 +708,8 @@ public final class Type {
    *
    * @return the size of the arguments of the method (plus one for the implicit this argument),
    *     argumentsSize, and the size of its return value, returnSize, packed into a single int i =
-   *     {@code (argumentsSize << 2) | returnSize} (argumentsSize is therefore equal to {@code
+   *     {@code (argumentsSize << 2) | returnSize} (argumentsSize is therefore equal to {@code
-   *     i &gt;&gt; 2}, and returnSize to {@code i &amp; 0x03}).
+   *     i >> 2}, and returnSize to {@code i & 0x03}).
    */
   public int getArgumentsAndReturnSizes() {
     return getArgumentsAndReturnSizes(getDescriptor());
@@ -721,8 +721,8 @@ public final class Type {
    * @param methodDescriptor a method descriptor.
    * @return the size of the arguments of the method (plus one for the implicit this argument),
    *     argumentsSize, and the size of its return value, returnSize, packed into a single int i =
-   *     {@code (argumentsSize &lt;&lt; 2) | returnSize} (argumentsSize is therefore equal to {@code
+   *     {@code (argumentsSize << 2) | returnSize} (argumentsSize is therefore equal to {@code
-   *     i &gt;&gt; 2}, and returnSize to {@code i &amp; 0x03}).
+   *     i >> 2}, and returnSize to {@code i & 0x03}).
    */
   public static int getArgumentsAndReturnSizes(final String methodDescriptor) {
     int argumentsSize = 1;

spring-core/src/main/java/org/springframework/util/DigestUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2022 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.

spring-messaging/src/main/java/org/springframework/messaging/simp/broker/AbstractBrokerMessageHandler.java

@@ -262,7 +262,7 @@ public abstract class AbstractBrokerMessageHandler
 	 * may still independently alternate between being on and off depending on the
 	 * concrete subclass implementation.
 	 * <p>Application components may implement
-	 * {@code org.springframework.context.ApplicationListener&lt;BrokerAvailabilityEvent&gt;}
+	 * {@code org.springframework.context.ApplicationListener<BrokerAvailabilityEvent>}
 	 * to receive notifications when broker becomes available and unavailable.
 	 */
 	public boolean isBrokerAvailable() {

spring-tx/src/main/java/org/springframework/transaction/interceptor/TransactionAttributeSourceEditor.java

@@ -29,7 +29,7 @@ import org.springframework.util.StringUtils;
  * {@link TransactionAttributeEditor} in this package.
  *
  * <p>Strings are in property syntax, with the form:<br>
- * {@code FQCN.methodName=&lt;transaction attribute string&gt;}
+ * {@code FQCN.methodName=<transaction attribute string>}
  *
  * <p>For example:<br>
  * {@code com.mycompany.mycode.MyClass.myMethod=PROPAGATION_MANDATORY,ISOLATION_DEFAULT}