ckeditor_fix_2.rb

# Add config.assets.precompile += Ckeditor.assets to application.rb
# Add gem 'turbo-sprockets-rails3' to my Gemfile under :assets group.
# Removed unused Gems from Gemfile.
# Bundle Install
# Remove the following lines from active_admin.js.coffee:

//= require active_admin/base
//= require ckeditor/override
//= require ckeditor/init

# Push to Heroku.
# Add the 3 lines back.
# Push again.
# Everything should work because most of the assets have been recompiled before pushing with ckeditor.