Simply couple of includes in the docs site (#7607)

Merge pull request 7607

docs/_includes/docs_contents.html

@@ -11,11 +11,7 @@
             {% if page.url contains p.url %}current{% endif %}
           {% endif %}">
             <a href="{{ p.url }}">
-              {% if p.menu_name %}
-                {{ p.menu_name }}
-              {% else %}
-                {{ p.title }}
-              {% endif %}
+              {{ p.menu_name | default: p.title }}
             </a>
           </li>
         {% endfor %}

docs/_includes/docs_contents_mobile.html

@@ -6,11 +6,7 @@
       {% for item in section.docs %}
         {% assign p = site.documents | where: "url", item.link | first %}
         <option value="{{ p.url }}">
-          {% if p.menu_name %}
-            {{ p.menu_name }}
-          {% else %}
-            {{ p.title }}
-          {% endif %}
+          {{ p.menu_name | default: p.title }}
         </option>
       {% endfor %}
     </optgroup>

docs/_includes/step-index.html

@@ -1,5 +1,3 @@
-
-
 {% assign docs = site.docs | where_exp: "doc", "doc.url contains '/step-by-step/'" %}
 
 {% for tutorial in tutorials %}