Improve signatures enumeration and order

_includes/signatures.html

@@ -1,16 +1,29 @@
 <p><b>Signed:</b></p>
 <ol>
-{% capture signs %}
-  {% for sign_hash in site.data.signed %}
-    {% assign signature = sign_hash[1] %}
-    |{{signature.name | escape }}#{{signature.link | escape }}
-  {% endfor %}
-{% endcapture %}
-{% assign sorted_signs = signs | split: '|' | sort %}
-{% for signature in sorted_signs %}
-  {% assign sign_items = signature | split: '#' %}
-  {% if sign_items[0] and sign_items[1] %} 
-  <li><a href="{{ sign_items[1] | strip }}">{{ sign_items[0] | strip }}</a></li>
-  {% endif %} 
-{% endfor %}
-</ol>
+{%- capture signs -%}
+  {%- for sign_hash in site.data.signed -%}
+    {%- assign signature = sign_hash[1] -%}
+    {%- assign name = signature.name | strip -%}
+    {%- assign name_order = name | downcase -%}
+    {%- assign first_char = name_order | slice: 0 -%}
+    {%- assign first_number = first_char | plus: 0 | append: '' -%}
+    {%- if first_char == first_number -%}
+      {%- assign name_order = name_order | prepend: '~' -%}
+    {%- endif -%}
+    <array>{{ name_order | escape }}<field>
+    <field>{{ name | escape }}<field>
+    <field>{{ signature.link | strip | escape }}<field>
+  {%- endfor -%}
+{%- endcapture -%}
+{%- assign sorted_signs = signs | split: '<array>' | sort -%}
+{%- for signature in sorted_signs -%}
+  {%- assign sign_items = signature | split: '<field>' -%}
+  {%- if sign_items[2] and sign_items[4] -%}
+  {%- assign name = sign_items[2] -%}
+  {%- assign link = sign_items[4] -%}
+  {% comment %}Add whitespace{% endcomment %}
+  <li><a href="{{ link }}">{{ name }}</a></li>
+  {%- endif -%}
+{%- endfor -%}
+{% comment %}Add whitespace{% endcomment %}
+</ol>