add Gist provider to API docs
@@ -33,6 +33,8 @@ Currently supported providers, their prefixes and specs are:
+------------+--------------------+-------------------------------------------------------------+----------------------------+
| GitLab | ``gl`` | ``<url-escaped-namespace>/<commit-sha-or-tag-or-branch>`` | |
+------------+--------------------+-------------------------------------------------------------+----------------------------+
+| Gist | ``gist`` | ``<github-username>/<gist-id><commit-sha-or-tag>`` | |
++------------+--------------------+-------------------------------------------------------------+----------------------------+
Next, construct an appropriate URL and send a request.
