Do not escape titlesuffix. — becomes —

leading to the character entity to be displayed in the tab title in
the browser.

Author: rouilj

doc/_templates/layout.html

@@ -87,7 +87,7 @@ <h3>{{ _('Quick search') }}</h3>
     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
     {{ metatags }}
     {%- if builder != 'htmlhelp' %}
-      {%- set titlesuffix = " &mdash; " + docstitle|e %}
+      {%- set titlesuffix = " &mdash; " + docstitle %}
     {%- endif %}
     <title>{{ title|striptags }}{{ titlesuffix }}</title>
     {%- if builder == 'web' %}