title: The program 'bundle' is currently not installed
body: <p>while i was trying to run this code "bundle install --without production"
  I am getting an error like 
  "The program 'bundle' is currently not installed.  You can install it by typing:
  sudo apt-get install ruby-bundler
  "
  I have installed bundle already but still getting this error.</p>
  
  <p>This problem occurred while i was learning from Harlt's.."Updating Gemfile" at Heroku setup section</p>