Removed trailing commas in object initializers (Google Closure does not like them).

lib/runtime.js

@@ -47,7 +47,7 @@ PEG.StringUtils = {
       .replace(/\u2029/g, '\\u2029') // paragraph separator
       .replace(/\n/g, '\\n')         // line feed
       + '"';
-  },
+  }
 
 };
 
@@ -147,7 +147,7 @@ PEG.Parser.prototype = {
     initialize();
 
     var initialContext = {
-      reportMatchFailures: true,
+      reportMatchFailures: true
     };
 
     var result = this["_parse_" + this._startRule](initialContext);