added rst help link

rhodecode/config/routing.py

@@ -67,6 +67,9 b' def make_map(config):'
     rmap.connect('bugtracker',
                  "http://bitbucket.org/marcinkuzminski/rhodecode/issues",
                  _static=True)
+    rmap.connect('rst_help',
+                 "http://docutils.sourceforge.net/docs/user/rst/quickref.html",
+                 _static=True)
     rmap.connect('rhodecode_official', "http://rhodecode.org", _static=True)
 
     #ADMIN REPOSITORY REST ROUTES

rhodecode/templates/changeset/changeset_file_comment.html

@@ -38,7 +38,8 b''
   %if c.rhodecode_user.username != 'default':
       ${h.form(h.url('changeset_comment', repo_name=c.repo_name, revision=c.changeset.raw_id))}
       <div class="clearfix">
-          <div class="comment-help">${_('Commenting on line')} {1} ${_('comments parsed using RST syntax')}</div>
+          <div class="comment-help">${_('Commenting on line')} {1} ${_('comments parsed using')} 
+          <a href="${h.url('rst_help')}">RST</a> ${_('syntax')}</div>
               ${h.textarea('text')}
       </div>
       <div class="comment-button">