Add autoclass entry for Artist API doc.

anntzer · anntzer · commit c4f9e735de73 · 2017-02-28T21:33:45.000-08:00
Adding an autoclass entry in the Artist API ensures that that class
appears in the intersphinx `build/html/object.inv`, as can be checked by
```
"matplotlib.artist.Artist" in (
    sphinx.ext.intersphinx.read_inventory(
        open("build/html/objects.inv", "rb"), None, lambda *args: None)[
            "py:class"])
```
(now returns True).

This allows other projects to link to that class in their docs using
```
`Artist` &lt;matplotlib.artist.Artist&gt;
```

This possibility used to be present, but disappeared when the Artist API
doc got refactored.  (Other classes that appear in the API docs are fine
as they already use autoclass.)
diff --git a/doc/api/artist_api.rst b/doc/api/artist_api.rst
@@ -16,6 +16,7 @@
 ``Artist`` class
 ================
 
+.. autoclass:: Artist
 
 Interactive
 -----------
