Build: put back "lint" command to the "dev" list

Also fix lint error in `data` module.

It seems this command was removed from the list during merge

Gruntfile.js

@@ -182,7 +182,7 @@ module.exports = function( grunt ) {
 	grunt.registerTask( "test", [ "test_fast", "promises_aplus_tests" ] );
 
 	// Short list as a high frequency watch task
-	grunt.registerTask( "dev", [ "build:*:*", "uglify", "remove_map_comment", "dist:*" ] );
+	grunt.registerTask( "dev", [ "build:*:*", "lint", "uglify", "remove_map_comment", "dist:*" ] );
 
 	grunt.registerTask( "default", [ "dev", "test_fast", "compare_size" ] );
 };

src/data/var/acceptData.js

@@ -4,6 +4,7 @@ define( function() {
  * Determines whether an object can have data
  */
 return function( owner ) {
+
 	// Accepts only:
 	//  - Node
 	//    - Node.ELEMENT_NODE