title: What text editor is git using?
body: <p>I am new to git.</p>
  
  <p>When I enter <code>git commit</code> into command prompt, it changes to some kind of text editor in that same command prompt window. What is this text editor? Is it Vim? Emacs? I have downloaded neither of these.</p>
  
  <p>I want to know what it's called so that I can look up how to use it. I was unable to even exit the editor after typing a message. A Google search suggested that in Vim I should press Esc then <code>:wq</code>. That worked, but it hardly seems discoverable.</p>