We now require numpy 1.16 (per setup.py and NEP29).

... per dev call.

The docstring of add_axes/add_subplot still needs to be changed, but
this should wait until after projection reuse behavior is finalized.

Also, cases of polar=True in the tests have been left as such, to keep
exercising that API.

A single implementation can be written in the base class.

Also, the alignment groupers only need to be defined in FigureBase;
we don't need to redefine them in the Figure subclass.

ENH: add redirect_from sphinx extension

Co-authored-by: Antony Lee <anntzer.lee@gmail.com>
Co-authored-by: Elliott Sales de Andrade <quantum.analyst@gmail.com>

…acement

DOC: add fixed-aspect colorbar examples

Previously the non-interactive backends, other than Agg, did not
define `draw` methods and fell back to the base no-op version.
However, we have been documenting that the correct way to update the
various internal state we keep (run tight/constrained layouts, auto
limits, text size/position, ...), this is now a bug due to our
suggested usage drifting.

closes matplotlib#18407

Move the marks to skip if various latex installs are missing to be
visible on other modules.

The full artist tree needs to be walked in `draw` to ensure that
deferred work is done.

DOC: use config.yml to redirect questions from GH issues to discourse

TST: Skip setting up a tmpdir in tests that don't need one.

DOC: better intro for dates.py

It was accidentally ignored since 154a616.

Dedupe docstrings of Figure.{get_axes,axes}.

Prefer Axes.remove() over Figure.delaxes() in docs.

…-kerning

Add kerning to single-byte strings in PDFs

Clean up E265 in examples.

Fix handling of warn keyword in in Figure.show.

Also check that the first element of the a list layout is not a string.

closes matplotlib#19631

FIX: do not allow single element list of str in subplot_mosaic

pick_events were previously incorrectly emitted twice due to the
combination of two recent(ish) chnages: Figures now always start with a
FigureCanvasBase attached -- eventually switching to a concrete subclass
of FigureCanvasBase for display or saving --, and callbacks are now
actually stored at the Figure level rather than the Canvas level.
Hence, the button_pick_id callback (in charge of emitting picks) would
previously be both registered both through the FigureCanvasBase and the
concrete subclass.  The fix is to also move that callback to the Figure
level, so that each Figure only has one such callback.

It was accidentally(?) added to the public API in the yet-to-be-released
1173770.

Fix double picks.

This function copies minpos when frozen is called.
This commit resolves matplotlib#19296.

Co-authored-by: Agriad <agriad1@yahoo.com>
Co-authored-by: davek10 <94davek@gmail.com>
Co-authored-by: tjr16 <jerryaccount@126.com>

Fix comment in RectangleSelector

Don't turn check_for_pgf into public API.

Fix Bbox.frozen() not copying minposx/minposy

Restore _AxesStack to track a Figure's Axes order.

This prevents segfaults when multiple threads try to manipulate the
FT2Font object simultaneously.

closes matplotlib#19560

Co-authored-by: Antony Lee <anntzer.lee@gmail.com>

FIX: make the cache in font_manager._get_font keyed by thread id

Use globals() instead of locals() for adding colormaps as names to cm module

Co-authored-by: hannah <story645@gmail.com>

Improve docs for rgba conversion