doc improvement.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@11224 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/AbortException.java

@@ -4,8 +4,9 @@ import java.io.IOException;
 
 /**
  * Signals a failure where the error message was reported.
- * The stack trace shouldn't be printed.
- * 
+ * When this exception is caughted,
+ * the stack trace will not be printed, and the build will be marked as a failure.
+ *
  * @author Kohsuke Kawaguchi
 */
 public final class AbortException extends IOException {