Use standard indentation in JavaScript files

In Drupal 7, none of the JavaScript files were indented within the file-level closure. Starting with Drupal 8, The "indent" option of JSHint was added to the default configuration to allow for code indentation validation. It means that all the code within the file-level closure needs to be indented. This change will allow for automated formating tools to be run on Drupal JavaScript.

Drupal 7

(function ($, Drupal) {

"use strict";

Drupal.behavior.something = {};

})(jQuery, Drupal);

Drupal 8

(function ($, Drupal) {

  "use strict";

  Drupal.behavior.something = {};

})(jQuery, Drupal);