mkdocs-material: fix displaying arrow for sections with 1 child page

Fixes #9

Author: oprypin

mkdocs_section_index/rewrites.py

@@ -58,6 +58,9 @@ def _transform_material_nav_item_template(src: str) -> str:
         return src.replace(
             "{% set indexes = [] %}",
             "{% set indexes = [nav_item] if nav_item.url else [] %}",
+        ).replace(
+            "{% if nav_item.children | length > 1 %}",
+            "{% if nav_item.children %}",
         )
 
     # The above only for versions >= 7.3, the below only for versions < 7.3.

tests/rewrites/material-nav-item-4.yml

@@ -131,7 +131,7 @@ output: |
           {% set class = "md-nav__link--active" if index == page %}
           <div class="md-nav__link md-nav__link--index {{ class }}">
             <a href="{{ index.url | url }}">{{ nav_item.title }}</a>
-            {% if nav_item.children | length > 1 %}
+            {% if nav_item.children %}
               <label for="{{ path }}">
                 <span class="md-nav__icon md-icon"></span>
               </label>