fix lint in file.js

Author: vladikoff

lib/grunt/file.js

@@ -383,7 +383,7 @@ file.isLink = function() {
   var filepath = path.join.apply(path, arguments);
   try {
     return fs.lstatSync(filepath).isSymbolicLink();
-  } catch(e) {
+  } catch (e) {
     if (e.code === 'ENOENT') {
       // The file doesn't exist, so it's not a symbolic link.
       return false;