simple typo in whats_new

Author: jenshnielsen

doc/users/whats_new.rst

@@ -55,7 +55,7 @@ Added a `legend_handler` for :class:`~matplotlib.collections.PolyCollection` as
 :func:`~matplotlib.axes.Axes.stackplot`.
 
 Support for alternate pivots in mplot3d quiver plot
-``````````````````````````````````````````````````
+```````````````````````````````````````````````````
 Added a :code:`pivot` kwarg to :func:`~mpl_toolkits.mplot3d.Axes3D.quiver`
 that controls the pivot point around which the quiver line rotates. This also
 determines the placement of the arrow head along the quiver line.