Merge pull request less#2866 from mlowijs/master

Changed octals to hex for ES6 strict mode

Author: matthew-dean

lib/less-node/lessc-helper.js

@@ -15,8 +15,8 @@ var lessc_helper = {
             'red'       : [31, 39],
             'grey'      : [90, 39]
         };
-        return '\033[' + styles[style][0] + 'm' + str +
-               '\033[' + styles[style][1] + 'm';
+        return '\x1b[' + styles[style][0] + 'm' + str +
+               '\x1b[' + styles[style][1] + 'm';
     },
 
     //Print command line options