Replace 'e.g.' with 'for example' in documentation and comments

Closes gh-33515

spring-jcl/src/main/java/org/apache/commons/logging/LogAdapter.java

@@ -76,7 +76,7 @@ final class LogAdapter {
 			// java.logging module is not present by default on JDK 9. We are requiring
 			// its presence if neither Log4j nor SLF4J is available; however, in the
 			// case of Log4j or SLF4J, we are trying to prevent early initialization
-			// of the JavaUtilLog adapter - e.g. by a JVM in debug mode - when eagerly
+			// of the JavaUtilLog adapter - for example, by a JVM in debug mode - when eagerly
 			// trying to parse the bytecode for all the cases of this switch clause.
 			createLog = JavaUtilAdapter::createLog;
 		}

spring-jcl/src/main/java/org/apache/commons/logging/LogFactory.java

@@ -38,7 +38,7 @@ package org.apache.commons.logging;
  * <p><b>Note that this Commons Logging variant is only meant to be used for
  * infrastructure logging purposes in the core framework and in extensions.</b>
  * It also serves as a common bridge for third-party libraries using the
- * Commons Logging API, e.g. Apache HttpClient, and HtmlUnit, bringing
+ * Commons Logging API, for example, Apache HttpClient, and HtmlUnit, bringing
  * them into the same consistent arrangement without any extra bridge jars.
  *
  * <p><b>For logging need in application code, prefer direct use of Log4j 2.x
@@ -70,7 +70,7 @@ public abstract class LogFactory {
 
 	/**
 	 * This method only exists for compatibility with unusual Commons Logging API
-	 * usage like e.g. {@code LogFactory.getFactory().getInstance(Class/String)}.
+	 * usage like, for example, {@code LogFactory.getFactory().getInstance(Class/String)}.
 	 * @see #getInstance(Class)
 	 * @see #getInstance(String)
 	 * @deprecated in favor of {@link #getLog(Class)}/{@link #getLog(String)}

spring-jcl/src/main/java/org/apache/commons/logging/impl/package-info.java

@@ -4,7 +4,7 @@
  * with special support for Log4J 2, SLF4J and {@code java.util.logging}.
  *
  * <p>This {@code impl} package is only present for binary compatibility
- * with existing Commons Logging usage, e.g. in Commons Configuration.
+ * with existing Commons Logging usage, for example, in Commons Configuration.
  * {@code NoOpLog} can be used as a {@code Log} fallback instance, and
  * {@code SimpleLog} is not meant to work (issuing a warning when used).
  */