title: What does this icon mean in the Powerline shell git segment?
body: <p>I recently switched from using <a href="https://github.com/powerline/powerline" rel="nofollow">Powerline</a> only in Vim to also using it in zsh and tmux. Using the default configuration for everything so far.</p>
  
  <p>In the shell prompt for a git repo, can anyone explain what the information shown next to the branch name is? (in yellow in the screenshot)</p>
  
  <p><a href="https://i.stack.imgur.com/hHBSQ.png" rel="nofollow"><img src="https://i.stack.imgur.com/hHBSQ.png" alt="Powerline git information"></a></p>
  
  <p>It doesn't seem to be number of commits ahead/behind, which was my first thought.</p>
  
  <p>I'm using the patched version of Inconsolata so hopefully all the icons are displaying as intended.</p>