title: How to "git show" the diffs for a merge commit?
body: <p>When I have a merge commit and run <code>git show &lt;commit-ish&gt;</code>, it shows only the commit log, not the the diffs:</p>
  <pre><code>commit c0f50178901e09a1237f7b9d9173ec5d1c4936c
  Merge: ed234b ded051
  Author: abc
  Date:   Mon Nov 21 15:56:33 2016 -0800
  
      Merge branch 'abc'
  </code></pre>
  <p>I understand the real commit is in merge log, but I want to save typing.  Is there a way to show the diff in one?</p>