title: git commit -a confusion
body: <p>I am using Git Bash and am trying to figure out what is happening when I type 'git commit -a'.</p>
  
  <p>Looks like VIM opens up to edit my commit message but how do I save and actually complete this commit?  I type in the editor and hit enter but it just creates another line. </p>
  
  <p>FYI: I am using VM Fusion on my mac so some of my keys might be a little different</p>