Comment on @doubt entries

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/branches/BRANCH_2_0_EXPERIMENTAL/rgoers@949489 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/log4j2-core/src/main/java/org/apache/logging/log4j/core/Log4jLogEvent.java b/log4j2-core/src/main/java/org/apache/logging/log4j/core/Log4jLogEvent.java
index 09930ad..6216365 100644
--- a/log4j2-core/src/main/java/org/apache/logging/log4j/core/Log4jLogEvent.java
+++ b/log4j2-core/src/main/java/org/apache/logging/log4j/core/Log4jLogEvent.java
@@ -120,6 +120,9 @@
     /**
      * @doubt Not quite sure what is going on with the loop, but looks like it might
      *     drop only the deepest call from the fully qualified class, not all of them.
+     * (RG) The loop finds the FQCN and on the next iteration returns the StackTraceElement of
+     * the caller of FQCN. Don't know what you mean by "not all of them" as it only returns
+     * a single element.
      */
     public StackTraceElement getSource() {
         if (fqcnOfLogger == null) {