Tweak single doc notice

assets/javascripts/templates/notice_tmpl.coffee

@@ -2,7 +2,7 @@ notice = (text) -> """<p class="_notice-text">#{text}</p>"""
 
 app.templates.singleDocNotice = (doc) ->
   notice """ You're currently browsing the #{doc.name} documentation. To browse all docs, go to
-             <a href="http://#{app.config.production_host}" target="_top">#{app.config.production_host}</a>. """
+             <a href="http://#{app.config.production_host}" target="_top">#{app.config.production_host}</a> (or press <code>esc</code>). """
 
 app.templates.disabledDocNotice = ->
   notice """ <strong>This documentation is currently disabled.</strong>