Kill trailing whitespaces in javascript files

app/assets/javascripts/post_flags.js

@@ -1,22 +1,22 @@
 (function() {
   Danbooru.PostFlag = {};
-  
+
   Danbooru.PostFlag.initialize_all = function() {
     if ($("#c-posts").length && $("#a-show").length) {
       this.initialize_flag();
       this.hide_or_show_flag_link();
     }
   }
-  
+
   Danbooru.PostFlag.hide_or_show_flag_link = function() {
     if (Danbooru.meta("post-is-deleted") === "true") {
       $("#flag").hide();
     }
   }
-  
+
   Danbooru.PostFlag.initialize_flag = function() {
     $("#flag-dialog").dialog({
-      autoOpen: false, 
+      autoOpen: false,
       width: 700,
       modal: true,
       buttons: {