See issue #34 for more on this but we are printing out diplicated range

warnings more than is acceptable.  Warning will get re-enabled next release
when we fix #34 (warning itself is not very important so we do not anticipate
anyone noticing past this commit message :) ).

src/org/joni/ScanEnvironment.java

@@ -152,7 +152,8 @@ void closeBracketWithoutEscapeWarn(String s) {
     void ccDuplicateWarn() {
         if (syntax.warnCCDup() && (warningsFlag & SyntaxProperties.WARN_CC_DUP) == 0) {
             warningsFlag |= SyntaxProperties.WARN_CC_DUP;
-            warnings.warn("character class has duplicated range");
+            // FIXME: DEFAULT handler is erroneously printlning extra warnings JRuby/likely any other project does not want (see issue #34 for work on re-enabling this).
+            //warnings.warn("character class has duplicated range");
         }
     }
 }