don't escape the mdash

Author: Richard Jones

website/www/_templates/layout.html

@@ -5,7 +5,8 @@
     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
     {{ metatags }}
     {%- if builder != 'htmlhelp' %}
-      {%- set titlesuffix = " &mdash; " + docstitle|e %}
+      {%- set titlesuffix = docstitle|e %}
+      {%- set titlesuffix = " &mdash; " + titlesuffix %}
     {%- endif %}
     <title>{{ title|striptags }}{{ titlesuffix }}</title>
     {%- if builder == 'web' %}