Simplified nav nesting

(cherry picked from commit eeb3f342b17a744d0c2b2f0360359fa3276f8abd)

_includes/nav.html

-<nav role="navigation" aria-label="Main navigation">
-  <ul class="navigation-list">
-    {%- assign pages_list = site.html_pages | sort:"nav_order" -%}
-    {%- for node in pages_list -%}
-      {%- unless node.nav_exclude -%}
-        {%- if node.parent == nil -%}
-          <li class="navigation-list-item{% if page.url == node.url or page.parent == node.title or page.grand_parent == node.title %} active{% endif %}">
-            {%- if page.parent == node.title or page.grand_parent == node.title -%}
-              {%- assign first_level_url = node.url | absolute_url -%}
-            {%- endif -%}
-            <a href="{{ node.url | absolute_url }}" class="navigation-list-link{% if page.url == node.url %} active{% endif %}">{{ node.title }}</a>
-            {%- if node.has_children -%}
-              {%- assign children_list = site.html_pages | where: "parent", node.title | sort:"nav_order" -%}
-              <ul class="navigation-list-child-list ">
-                {%- for child in children_list -%}
-                  <li class="navigation-list-item {% if page.url == child.url or page.parent == child.title %} active{% endif %}">
-                    {%- if page.url == child.url or page.parent == child.title -%}
-                      {%- assign second_level_url = child.url | absolute_url -%}
-                    {%- endif -%}
-                    <a href="{{ child.url | absolute_url }}" class="navigation-list-link{% if page.url == child.url %} active{% endif %}">{{ child.title }}</a>
-                    {%- if child.has_children -%}
-                        {%- assign grand_children_list = site.html_pages | where: "parent", child.title | sort:"nav_order" -%}
-                        <ul class="navigation-list-child-list">
-                        {%- for grand_child in grand_children_list -%}
-                          <li class="navigation-list-item {% if page.url == grand_child.url %} active{% endif %}">
-                            <a href="{{ grand_child.url | absolute_url }}" class="navigation-list-link{% if page.url == grand_child.url %} active{% endif %}">{{ grand_child.title }}</a>
-                          </li>
-                        {%- endfor -%}
-                      </ul>
-                    {%- endif -%}
-                  </li>
-                {%- endfor -%}
-              </ul>
-            {%- endif -%}
-          </li>
-        {%- endif -%}
-      {%- endunless -%}
-    {%- endfor -%}
-  </ul>
-</nav>
+<ul class="navigation-list">
+  {%- assign pages_list = site.html_pages | sort:"nav_order" -%}
+  {%- for node in pages_list -%}
+    {%- unless node.nav_exclude -%}
+      {%- if node.parent == nil -%}
+        <li class="navigation-list-item{% if page.url == node.url or page.parent == node.title or page.grand_parent == node.title %} active{% endif %}">
+          {%- if page.parent == node.title or page.grand_parent == node.title -%}
+            {%- assign first_level_url = node.url | absolute_url -%}
+          {%- endif -%}
+          <a href="{{ node.url | absolute_url }}" class="navigation-list-link{% if page.url == node.url %} active{% endif %}">{{ node.title }}</a>
+          {%- if node.has_children -%}
+            {%- assign children_list = site.html_pages | where: "parent", node.title | sort:"nav_order" -%}
+            <ul class="navigation-list-child-list ">
+            {%- for child in children_list -%}
+              <li class="navigation-list-item {% if page.url == child.url or page.parent == child.title %} active{% endif %}">
+                {%- if page.url == child.url or page.parent == child.title -%}
+                  {%- assign second_level_url = child.url | absolute_url -%}
+                {%- endif -%}
+                <a href="{{ child.url | absolute_url }}" class="navigation-list-link{% if page.url == child.url %} active{% endif %}">{{ child.title }}</a>
+                {%- if child.has_children -%}
+                  {%- assign grand_children_list = site.html_pages | where: "parent", child.title | sort:"nav_order" -%}
+                  <ul class="navigation-list-child-list">
+                  {%- for grand_child in grand_children_list -%}
+                    <li class="navigation-list-item {% if page.url == grand_child.url %} active{% endif %}">
+                      <a href="{{ grand_child.url | absolute_url }}" class="navigation-list-link{% if page.url == grand_child.url %} active{% endif %}">{{ grand_child.title }}</a>
+                    </li>
+                  {%- endfor -%}
+                  </ul>
+                {%- endif -%}
+              </li>
+            {%- endfor -%}
+            </ul>
+          {%- endif -%}
+        </li>
+      {%- endif -%}
+    {%- endunless -%}
+  {%- endfor -%}
+</ul>

_layouts/default.html

@@ -4,7 +4,7 @@ layout: table_wrappers
 
 <!DOCTYPE html>
 
-<html lang="{{ site.lang | default: "en-US" }}">
+<html lang="{{ site.lang | default: 'en-US' }}">
 {% include head.html %}
 <body>
 
@@ -14,10 +14,9 @@ layout: table_wrappers
         <a href="{{ site.url }}{{ site.baseurl }}" class="site-title lh-tight">{% include title.html %}</a>
         <button class="menu-button fs-3 js-main-nav-trigger" data-text-toggle="Hide" type="button">Menu</button>
       </div>
-
-      <div class="navigation main-nav js-main-nav">
+      <nav role="navigation" aria-label="Main navigation" class="navigation main-nav js-main-nav">
         {% include nav.html %}
-      </div>
+      </nav>
       <footer class="site-footer">
         <p class="text-small text-grey-dk-000 mb-4">This site uses <a href="https://github.com/pmarsceill/just-the-docs">Just the Docs</a>, a documentation theme for Jekyll.</p>
       </footer>