More information on commit message format. CASSANDRA-15246

git-svn-id: http://svn.apache.org/repos/asf/cassandra/site@1864672 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/doc/4.0/development/patches.html b/src/doc/4.0/development/patches.html
index fc5e605..d52527c 100644
--- a/src/doc/4.0/development/patches.html
+++ b/src/doc/4.0/development/patches.html
@@ -221,7 +221,12 @@
 </ol>
 </div></blockquote>
 <ol class="arabic simple" start="6">
-<li>Include a CHANGES.txt entry (put it at the top of the list), and format the commit message appropriately in your patch ending with the following statement on the last line: <code class="docutils literal notranslate"><span class="pre">patch</span> <span class="pre">by</span> <span class="pre">X;</span> <span class="pre">reviewed</span> <span class="pre">by</span> <span class="pre">Y</span> <span class="pre">for</span> <span class="pre">CASSANDRA-ZZZZZ</span></code></li>
+<li>Include a CHANGES.txt entry (put it at the top of the list), and format the commit message appropriately in your patch as below:</li>
+<div><div class="highlight-none notranslate"><div class="highlight"><pre><span></span>&lt;One sentence description, usually Jira title and CHANGES.txt summary&gt;
+&lt;Optional lengthier description&gt;
+patch by &lt;Authors&gt;; reviewed by &lt;Reviewers&gt; for CASSANDRA-#####
+</pre></div>
+</div>
 <li>When you’re happy with the result, create a patch:</li>
 </ol>
 <blockquote>