Use index.js. Sprockets uses files named index for a special purpose.

Author: tors

vendor/assets/javascripts/jquery-fileupload.js renamed to vendor/assets/javascripts/jquery-fileupload/index.js

@@ -3,4 +3,4 @@
 //=require jquery-fileupload/jquery.fileupload
 //=require jquery-fileupload/jquery.fileupload-ip
 //=require jquery-fileupload/jquery.fileupload-ui
-//=require jquery-fileupload/locale
+//=require jquery-fileupload/locale