1API Changes for 3.0.1
2=====================
3
4`.tight_layout.auto_adjust_subplotpars` can return ``None`` now if the new
5subplotparams will collapse axes to zero width or height.  This prevents
6``tight_layout`` from being executed.  Similarly
7`.tight_layout.get_tight_layout_figure` will return None.
8
9To improve import (startup) time, private modules are now imported lazily.
10These modules are no longer available at these locations:
11
12- ``matplotlib.backends.backend_agg._png``
13- ``matplotlib.contour._contour``
14- ``matplotlib.image._png``
15- ``matplotlib.mathtext._png``
16- ``matplotlib.testing.compare._png``
17- ``matplotlib.texmanager._png``
18- ``matplotlib.tri.triangulation._tri``
19- ``matplotlib.tri.triangulation._qhull``
20- ``matplotlib.tri.tricontour._tri``
21- ``matplotlib.tri.trifinder._tri``
22