title: "Emacs" before my username in zsh
body: <p>I installed zsh, set the oh-my-zsh and then set the powerline
  and when I use zsh, then before my name there "emacs". 
  It's look like:</p>
  
  <p><strong>EMACS</strong> > username > ~</p>
  
  <p>How to remove it?</p>