Remove spacing in template

Co-authored-by: Nemo157 <github@nemo157.com>

Author: jyn514

templates/rustdoc/topbar.html

@@ -211,7 +211,7 @@
 
     Display the platforms that the release has been built for
     #}
-    {% if metadata.doc_targets %}
+    {%- if metadata.doc_targets -%}
     <li class="pure-menu-item pure-menu-has-children">
         <a href="#" class="pure-menu-link" aria-label="Platform">
             {{ "cogs" | fas }}