Using: mention CC syntax

Author: phil-blain

index.html

@@ -56,6 +56,9 @@ <h2>How can you use GitGitGadget?</h2>
 				And you already pushed it to your own fork?
 				Good, now is the time to direct your web browser to <a href="https://github.com/gitgitgadget/git">https://github.com/gitgitgadget/git</a> (or to <a href="https://github.com/gitgitgadget/git">https://github.com/git/git</a> ) and to open a Pull Request.
 				Please make sure to use a descriptive Pull Request title and description; GitGitGadget will use these as the cover letter.
+				You can CC potential reviewers by adding a footer to the PR description with the following syntax:
+				<pre>CC: Revi Ewer &lt;revi.ewer@some.domain&gt;, Ill Takalook &lt;ill.takalook@other.domain&gt;</pre>
+			</p><p>
 				You will also want to read <a href="https://git-scm.com/docs/SubmittingPatches">Git's guidelines</a> to make sure that your contributions are in the expected form.
 			</p><p>
 				The first time you use GitGitGadget, you need to be added to the list of users with permission to use GitGitGadget (this is a <i>very</i> simple anti-spam measure).