more test case

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@23546 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/test/java/hudson/UtilTest.java

@@ -52,6 +52,8 @@ public class UtilTest extends TestCase {
 
         // $ escaping
         assertEquals("asd$${AA}dd", Util.replaceMacro("asd$$$${AA}dd",m));
+        assertEquals("$", Util.replaceMacro("$$",m));
+        assertEquals("$$", Util.replaceMacro("$$$$",m));
 
     	// test that more complex scenarios work
         assertEquals("/a/B/aa", Util.replaceMacro("/$A/$B/$AA",m));