Clean up code

lib/tokenize.js

@@ -19,7 +19,7 @@ var singleQuote  = "'".charCodeAt(0),
     wordEnd      = /[ \n\t\r\(\)\{\}:;@!'"\\]|\/(?=\*)/g,
     badBracket   = /.[\\\/\("'\n]/;
 
-export default  function (input) {
+export default function (input) {
     var tokens = [];
     var css    = input.css.valueOf();
 
@@ -34,7 +34,7 @@ export default  function (input) {
     var unclosed = function (what, end) {
         if ( input.safe ) {
             css += end;
-            next = css.length - 1;
+            next = length - 1;
         } else {
             throw input.error('Unclosed ' + what, line, pos  - offset);
         }