DOC: fix heading level

tacaswell · tacaswell · commit fb98f47a7b1a · 2019-02-23T10:51:47.000-05:00
diff --git a/doc/users/whats_new.rst b/doc/users/whats_new.rst
@@ -24,7 +24,7 @@ revision, see the :ref:`github-stats`.
 
 
 axes_grid1 and axisartist Axes no longer draw spines twice
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+----------------------------------------------------------
 
 Previously, spines of `axes_grid1` and `axisartist` Axes would be drawn twice,
 leading to a "bold" appearance.  This is no longer the case.
