Revert last commit and downgrade sphinx to fix docs builds

docs/_themes/lucuma/genindex.html

@@ -0,0 +1,68 @@
+{#
+    basic/genindex.html
+    ~~~~~~~~~~~~~~~~~~~
+
+    Template for an "all-in-one" index.
+
+    :copyright: Copyright 2007-2014 by the Sphinx team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+#}
+{% macro indexentries(firstname, links) %}
+  <dt>
+  {%- if links -%}
+    <a href="{{ links[0][1] }}">
+    {%- if links[0][0] %}<strong>{% endif -%}
+    {{ firstname|e }}
+    {%- if links[0][0] %}</strong>{% endif -%}
+    </a>
+
+    {%- for ismain, link in links[1:] -%}
+      , <a href="{{ link }}">{% if ismain %}<strong>{% endif -%}
+      [{{ loop.index }}]
+      {%- if ismain %}</strong>{% endif -%}
+      </a>
+    {%- endfor %}
+  {%- else %}
+    {{ firstname|e }}
+  {%- endif %}
+  </dt>
+{% endmacro %}
+
+{%- extends "layout.html" %}
+{% set title = t_nav_index %}
+
+
+{% block content %}
+<div id="genindex">
+  <div class="wrapper">
+    <h1 id="index">{{ t.nav_index }}</h1>
+
+    <div class="genindex-jumpbox">
+     {% for key, dummy in genindexentries -%}
+     <a href="#{{ key }}"><strong>{{ key }}</strong></a>
+     {% if not loop.last %}| {% endif %}
+     {%- endfor %}
+    </div>
+
+    {%- for key, entries in genindexentries %}
+    <h2 id="{{ key }}">{{ key }}</h2>
+    <table style="width: 100%" class="indextable genindextable"><tr>
+      {%- for column in entries|slice(2) if column %}
+      <td style="width: 33%" valign="top"><dl>
+        {%- for entryname, (links, subitems) in column %}
+          {{ indexentries(entryname, links) }}
+          {%- if subitems %}
+          <dd><dl>
+          {%- for subentryname, subentrylinks in subitems %}
+            {{ indexentries(subentryname, subentrylinks) }}
+          {%- endfor %}
+          </dl></dd>
+          {%- endif -%}
+        {%- endfor %}
+      </dl></td>
+      {%- endfor %}
+    </tr></table>
+    {% endfor %}
+  </div>
+</div>
+{% endblock %}

docs/_themes/lucuma/layout.html

@@ -22,6 +22,9 @@
   <link href="{{ pathto('_static/styles/responsive.css', 1) }}" rel="stylesheet">
   <link href="{{ pathto('_static/styles/print.css', 1) }}" rel="stylesheet" media="print">
 
+  {% if hasdoc('genindex') -%}
+    <link rel="index" title="{{ t.nav_index }}" href="{{ pathto('genindex') }}">
+  {%- endif %}
   {% if parents -%}
     <link rel="up" title="{{ parents[-1].title|striptags|e }}" href="{{ parents[-1].link|e }}">
   {%- endif %}

docs/requirements.txt

@@ -1,3 +1,3 @@
 -r ../dev-requirements-py3.txt
-sphinx==1.6.7
+sphinx==1.3.6 # pyup: ignore
 sphinx-issues==0.4.0