old_contents: // This is the master, all-in-one JavaScript file that's concatenated from the
  // others under this directory. Rather than adding JavaScript here, add it
  // somewhere else in this directory and it'll be included.
  
  //= require_tree .
  
new_contents: // This is the master, all-in-one JavaScript file that's concatenated from the
  // others under this directory. Rather than adding JavaScript here, add it
  // somewhere else in this directory and it'll be included.
  
  //= require lib/jquery/jquery-1.11.1
  
subject: Include jQuery explicitly.