Trimmed a bit too many whitespaces

Author: benjaoming

sphinx_rtd_theme/layout.html

@@ -65,10 +65,10 @@
       Workaround for: https://github.com/sphinx-doc/sphinx/issues/9730
       Once a fix is released in Sphinx, put an upper bound on the Sphinx version for the workaround
     -#}
-    {%- if builder == 'dirhtml' and pageurl.endswith('.html') -%}
-      {#- This expression trims away .html and adds a / -#}
+    {%- if builder == 'dirhtml' and pageurl.endswith('.html') %}
+      {#- This expression trims away .html and adds a / #}
       <link rel="canonical" href="{{ (pageurl|e)[:-5] }}/" />
-    {%- else -%}
+    {%- else %}
       <link rel="canonical" href="{{ pageurl|e }}" />
     {%- endif -%}
   {%- endif -%}