[bugfix] test _ char in isAlpha

msgFormatter.js

@@ -292,10 +292,13 @@ var formatText = (function() {
      * @return {boolean}
      **/
     function isAlphadec(c) {
+        return (/\S/).test(c);
+        /*
         return ((c >= 'A' && c <= 'Z') ||
             (c >= 'a' && c <= 'z') ||
             (c >= '0' && c <= '9') ||
             "àèìòùÀÈÌÒÙáéíóúýÁÉÍÓÚÝâêîôûÂÊÎÔÛãñõÃÑÕäëïöüÿÄËÏÖÜŸçÇßØøÅåÆæœ+".indexOf(c) !== -1);
+        */
     }
 
     /** @return {boolean} */