fixes #226 super == and fixes #227 escape \r \f

lib/src/js/builder.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // Utilities for building JS ASTs at runtime.  Contains a builder class
 // and a parser that parses part of the language.
 
 part of js_ast;
 
 
@@ skipping 282 matching lines @@
   Template statementTemplateYielding(Node ast) {
     return new Template.withStatementResult(ast);
   }
 
   /// Creates a literal js string from [value].
   LiteralString escapedString(String value, [String quote = '"']) {
    // Start by escaping the backslashes.
     String escaped = value.replaceAll('\\', '\\\\');
     // Do not escape unicode characters and ' because they are allowed in the
     // string literal anyway.
-    escaped = escaped.replaceAllMapped(new RegExp('\n|$quote|\b|\t|\v'), (m) {
+    var re = new RegExp('\n|\r|$quote|\b|\f|\t|\v');
+    escaped = escaped.replaceAllMapped(re, (m) {
       switch (m.group(0)) {
         case "\n" : return r"\n";
+        case "\r" : return r"\r";
         // Quotes are only replaced if they conflict with the containing quote
         case '"':   return r'\"';
         case "'":   return r"\'";
         case "`":   return r"\`";
         case "\b" : return r"\b";
         case "\t" : return r"\t";
         case "\f" : return r"\f";
         case "\v" : return r"\v";
       }
     });
@@ skipping 1250 matching lines @@
       expectCategory(RSQUARE);
       return expr;
     } else if (acceptCategory(HASH)) {
       return parseInterpolatedExpression();
     } else {
       error('Expected property name');
       return null;
     }
   }
 }