[FIXED HUDSON-6252] fix bad index calculation in SubText.subText which

caused StringIndexOutOfBoundsException in UrlAnnotator.  Added test.


git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@30102 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/MarkupText.java

@@ -98,7 +98,7 @@ public class MarkupText extends AbstractMarkupText {
         @Override
         public SubText subText(int start, int end) {
             return MarkupText.this.subText(this.start+start,
-                    end<0 ? this.end+1+end : this.end+end);
+                    end<0 ? this.end+1+end : this.start+end);
         }
 
         @Override