Merge pull request #517 from utzig/fix-old-release-urls

Fix nav link normalization for older releases
diff --git a/custom-theme/child_url.html b/custom-theme/child_url.html
index e5ecb62..fbf8e39 100644
--- a/custom-theme/child_url.html
+++ b/custom-theme/child_url.html
@@ -1,5 +1,5 @@
 {% if child.url %}
-  {{ child.url }}
+  {{ child.url|url }}
 {% else %}
   {% set child=child.children[0] %}
   {% include "child_url.html" %}
diff --git a/custom-theme/choose_doc_version.html b/custom-theme/choose_doc_version.html
index 8f3e19c..47af010 100644
--- a/custom-theme/choose_doc_version.html
+++ b/custom-theme/choose_doc_version.html
@@ -8,7 +8,7 @@
   <option value="/v1_4_0/" {% if config.extra.version=="v1_4_0" %}selected="selected" {% endif %}>
     Version: 1.4.0
   </option>
-  <option value="/v1_3_0/" {% if config.extra.version=="v1_3_0" %}selected="selected" {% endif %}>
+  <option value="/v1_3_0/os/introduction" {% if config.extra.version=="v1_3_0" %}selected="selected" {% endif %}>
     Version: 1.3.0
   </option>
   <option value="/v1_2_0/os/introduction" {% if config.extra.version=="v1_2_0" %}selected="selected" {% endif %}>
diff --git a/custom-theme/nested_toc.html b/custom-theme/nested_toc.html
index 9323766..02229e5 100644
--- a/custom-theme/nested_toc.html
+++ b/custom-theme/nested_toc.html
@@ -1,7 +1,7 @@
 {% if nav_item.children %}
   {% set child=nav_item.children[0] %}
   {% if child.title == "toc" %}
-    <li {% if child.active %}class="active"{% endif %}><a href="{{ child.url }}">{{ nav_item.title }}</a>
+    <li {% if child.active %}class="active"{% endif %}><a href="{{ child.url|url }}">{{ nav_item.title }}</a>
   {% else %}
     <li><a href="{% include "child_url.html" %}">{{ nav_item.title }}</a>
   {% endif %}
@@ -16,7 +16,7 @@
   {% endif %}
     </li>
 {% else %}
-    <li {% if nav_item.active %}class="active"{% endif %}>
-      <a href="{{ nav_item.url }}">{{ nav_item.title }}</a>
-    </li>
+  <li {% if nav_item.active %}class="active"{% endif %}>
+    <a href="{{ nav_item.url|url }}">{{ nav_item.title }}</a>
+  </li>
 {% endif %}