added a convenience method.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@14787 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/AbstractMarkupText.java

@@ -35,6 +35,13 @@ public abstract class AbstractMarkupText {
      */
     public abstract void addMarkup( int startPos, int endPos, String startTag, String endTag );
 
+    /**
+     * Adds a start tag and end tag around the entire text
+     */
+    public final void wrapBy(String startTag, String endTag) {
+        addMarkup(0,getText().length(),startTag,endTag);
+    }
+
     /**
      * Find all "tokens" that match the given pattern in this text.
      *