Fix coding style in test/unit/parser_spec.js

test/unit/parser_spec.js

@@ -43,7 +43,7 @@ describe('parser', function() {
       input.getByte = function(super_getByte) {
         // simulating end of file using null (see issue 2766)
         var ch = super_getByte.call(input);
-        return ch === 0x24 /* '$' */ ? -1 : ch;
+        return (ch === 0x24 /* '$' */ ? -1 : ch);
       }.bind(input, input.getByte);
       var lexer = new Lexer(input);
       var result = lexer.getString();