Added documentation of commit: syntax to detailed wiki syntax screen

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1247 e93f8b46-1217-0410-a6f0-8f06a7374b81

public/help/wiki_syntax_detailed.html

@@ -25,6 +25,7 @@ h1, h2, h3, h4 {  font-family: Trebuchet MS,Georgia,"Times New Roman",serif; }
 	<ul>
 	<li>Link to an issue: <strong>#124</strong> (displays <del><a href="/issues/show/124" class="issue" title="bulk edit doesn't change the category or fixed version properties (Closed)">#124</a></del>, link is striked-through if the issue is closed)</li>
 		<li>Link to a changeset: <strong>r758</strong> (displays <a href="/repositories/revision/1?rev=758" class="changeset" title="Search engine now only searches objects the user is allowed to view.">r758</a>)</li>
+		<li>Link to a changeset with a non-numeric hash: <strong>commit:"c6f4d0fd"</strong> (displays c6f4d0fd).  Added in <a href="/repositories/revision/1?rev=1236" class="changeset" title="Merged Git support branch (r1200 to r1226).">r1236</a>.</li>
 	</ul>