Merge pull request #33 from oreillymedia/chris-faucher-patch-1

Update index.md

Author: kristenORM

styleguide/index.md

@@ -1236,6 +1236,7 @@ title: O'Reilly Style Guide
 
 <h2 id="wordlist-M">M</h2>
 <ul>
+ <li><strong>Mac (or MacBook)</strong></li>
  <li>Mac</li>
  <li>macOS (replaces Mac OS X)</li>
  <li><strong>machine learning (n and a, no hyphen)</strong></li>