DOC: move an entry from whats_new -> api_changes

Author: tacaswell

doc/api/api_changes.rst

@@ -350,6 +350,18 @@ Moreover, the underlying implementation now uses ``\usepackage[utf8]{inputenc}``
 instead of ``\usepackage{ucs}\usepackage[utf8x]{inputenc}``.
 
 
+Return type of ArtistInspector.get_aliases changed
+--------------------------------------------------
+
+`ArtistInspector.get_aliases` previously returned the set of aliases as
+``{fullname: {alias1: None, alias2: None, ...}}``.  The dict-to-None mapping
+was used to simulate a set in earlier versions of Python.  It has now been
+replaced by a set, i.e. ``{fullname: {alias1, alias2, ...}}``.
+
+This value is also stored in `ArtistInspector.aliasd`, which has likewise
+changed.
+
+
 Removed ``pytz`` as a dependency
 --------------------------------
 

doc/users/whats_new.rst

@@ -239,19 +239,6 @@ easily position static elements in figure coordinates.
 
 
 
-
-Return type of ArtistInspector.get_aliases changed
---------------------------------------------------
-
-`ArtistInspector.get_aliases` previously returned the set of aliases as
-``{fullname: {alias1: None, alias2: None, ...}}``.  The dict-to-None mapping
-was used to simulate a set in earlier versions of Python.  It has now been
-replaced by a set, i.e. ``{fullname: {alias1, alias2, ...}}``.
-
-This value is also stored in `ArtistInspector.aliasd`, which has likewise
-changed.
-
-
 ``:math:`` directive renamed to ``:mathmpl:``
 ---------------------------------------------