Add favicon

Author: domdfcoding

doc-source/_templates/base.html

@@ -2,4 +2,5 @@
 {% extends "!base.html" %}
 {% block extrahead %}
 	<link href="{{ pathto("_static/style.css", True) }}" rel="stylesheet" type="text/css">
+	<link rel=icon href=https://python-formate.github.io/assets/formate.ico sizes="48x48" type="image/vnd.microsoft.icon">
 {% endblock %}

repo_helper.yml

@@ -17,6 +17,7 @@ use_whey: true
 min_coverage: 100
 sphinx_html_theme: furo
 docs_fail_on_warning: true
+preserve_custom_theme: true
 
 conda_channels:
  - conda-forge