Fixed javadoc for Task#handleErrorFlush

PR: 31153
Obtained from: Jayant Sai


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@276843 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/Task.java

@@ -317,7 +317,7 @@ public abstract class Task extends ProjectComponent {
     }
 
     /**
-     * Handles an error line by logging it with the ERR priority.
+     * Handles an error line by logging it with the WARN priority.
      *
      * @param output The error output to log. Should not be <code>null</code>.
      *