title: bundler's executable "bundle" conflicts with /usr/local/bin/bundle Overwrite the executable?
body: <p>When I install jekyll bundle and entering the command of <code>gem install jekyll bundler</code>.
  The terminal pop up the message of bundler's executable "bundle" conflicts with /usr/local/bin/bundle</p>
  
  <p>Overwrite the executable?</p>