Feb 16, 2020 · Jan 21, 2020
diff --git a/doc/api/prev_api_changes/api_changes_3.1.0.rst b/doc/api/prev_api_changes/api_changes_3.1.0.rst
 tries to switch from an already-started interactive backend to a different
 interactive backend, an `ImportError` will be raised.

 mplot3d auto-registration
 ~~~~~~~~~~~~~~~~~~~~~~~~~

 `mpl_toolkits.mplot3d` is always registered by default now. It is no
 longer necessary to import mplot3d to create 3d axes with ::

  ax = fig.add_subplot(111, projection="3d")

 Invalid points in PathCollections
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 PathCollections created with `~.Axes.scatter` now keep track of invalid points.
Original file line number	Diff line number	Diff line change
Expand Up		@@ -17,14 +17,6 @@ regardless of whether `matplotlib.pyplot` has been imported. If the user
		tries to switch from an already-started interactive backend to a different
		interactive backend, an `ImportError` will be raised.

		mplot3d auto-registration
		~~~~~~~~~~~~~~~~~~~~~~~~~

		`mpl_toolkits.mplot3d` is always registered by default now. It is no
		longer necessary to import mplot3d to create 3d axes with ::

		ax = fig.add_subplot(111, projection="3d")

		Invalid points in PathCollections
		~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
		PathCollections created with `~.Axes.scatter` now keep track of invalid points.
Expand Down