diff -r cb5123eff7d1 -r 2d93d2159e30 mercurial/templates/gitweb/map
--- a/mercurial/templates/gitweb/map	Fri Jun 09 13:45:36 2017 -0700
+++ b/mercurial/templates/gitweb/map	Fri Jun 09 13:55:51 2017 -0700
@@ -325,9 +325,12 @@
 breadcrumb = '&gt; <a href="{url|urlescape}">{name|escape}</a> '
 
 searchform = '
-  <form action="{url|urlescape}log">
-    {sessionvars%hiddenformentry}
-    <div class="search">
-      <input type="text" name="rev" value="{query|escape}" />
-    </div>
-  </form>'
+  <div class="search">
+    <form id="searchform" action="{url|urlescape}log">
+      {sessionvars%hiddenformentry}
+      <input name="rev" type="text" value="{query|escape}" size="40" />
+      <div id="hint">{searchhint}</div>
+    </form>
+  </div>'
+searchhint = 'Find changesets by keywords (author, files, the commit message), revision
+  number or hash, or <a href="{url|urlescape}help/revsets">revset expression</a>.'