title: Is the a shorter way of writing git diff HEAD^ HEAD?
body: <p>I find myself typing this pretty often, like when I made some change, committed it, and then either need to look up something I did there to figure out what to do next, or make sure I didn't add anything unintended to the commit before pushing it to a remote.</p>
  
  <p>Admittedly, <code>diff HEAD^ HEAD</code> is fast enough to type (<code>git di</code><kbd>TAB</kbd><code>H</code><kbd>TAB</kbd><kbd>&larr;</kbd><code>^ H</code><kbd>TAB</kbd>), but it still feels like there should be a better way.</p>
  
  <p><em>How do I easiest see all changes made in the last commit?</em></p>