It's redundant to "Creating multiple subplots using plt.subplots"
and the topic is better covered therein.

... preliminary to more refactoring.

Nearly everything is mechanical; the only subtle point is that figure()
does not need to handle the figure.foo rcParams as the Figure
constructor takes care of that.

Added density and combination hatching examples

FIX: new date rcParams weren't being evaluated

…ample

Remove the example "Easily creating subplots"

This is a bit particular anyway, but let's make it practical by
generating a real bar code and not only some random lines.

Fun fact: The used code is the GTIN-13 for "The Visual Display of
Quantitative Information", Edward R. Tufte.

Style cleanup to pyplot.

frame_format to support all listed by animation writers

Updated doc in images.py by adding direct link to 24-bit stink bug png

Remove unnecessary file save during test

Refresh what's new page for 3.3.0

Just like Qt, the drawing should only be done in the draw (paint) event,
so move the rubberband draw there. Also, make it black-and-white like
the Qt one.

Fixes #17773.

Improve hatch demo

The reference rendering for `$\operatorname{cos} x$` was incorrect. Since this
is also tested with `test_operator_space`, it can be safely dropped.

Fix drawing zoom rubberband on GTK backends.

BF: ignore CLOSEPOLY after NaN in PathNanRemover

* Force origin='upper' in specgram function

Specify origin='upper' in call to imshow within specgram to override rcparams setting for origin without changing rcparams itself. Delete origin from kwargs so there are not two occurrences of the origin parameter in the call to imshow (this also means the origin kwarg cannot be changed by the caller).

* DOC: indicate that origin is force set to upper

* Adding test for issue 17878

* DOC: Change rcParam from 'origin' to 'image.origin'

* TST: try changing origin in specgram call

* Document behavior change for specgram

* Document api behavior change

* Raise exception if origin kwarg passed to specgram

This ensures the origin kwarg is not silently ignored if passed to pyplot.specgram.

* TST: passing origin kwarg to specgram should fail

The function pyplot.specgram should raise a TypeError if origin is passed as a keyword argument.

* DOC: Remove note that origin='upper' in specgram

This note referenced the call to imshow inside of specgram, which might confuse users who do not know the implementation of specgram.

* TST: change from pytest xfail to pytest raises

Passing origin as a keyword argument should raise a type error, so test_specgram_origin_kwarg should raise an exception. Therefore, raises is a more precise check than xfail.

Co-authored-by: David Stansby <[email protected]>
Co-authored-by: Theodor Athanasiadis <[email protected]>
Co-authored-by: Tim Hoffmann <[email protected]>

DOC: Update paths for moved API/what's new fragments

... in particular regarding the undocumented *font_class* parameter.

Also rename an unrelated variable also named `font_class` to avoid
confusion.

Also remove redundant entry for mathfrak+mathit in `stix_virtual_fonts`
-- there's actually no frak+it font, the table just duplicates frak+rm,
but we already fallback to rm by default anyways.

As can be checked with
```
rcParams["ps.useafm"] = True
figtext(.5, .5, "$\\Lambda\varphi$")
savefig("/tmp/test.ps")
```
and inspecting the resulting file.

Typos and docs for mathtext fonts.

The ResizeObserver spec changed, though Firefox still does the old way.
Previous Chrome implemented an even older version, and 84 implements the
latest version, but not this in-between one we're using.

This is only implemented on Chrome, but prevents some blurriness.

and put that directory in the Travis cache, for perhaps an additional
speedup and to reduce the traffic we cause to the download sites

and use two processes for ccache compilation

$HOME/Downloads did not get cached, .cache/matplotlib already is

Fix ToolManager inconsistencies with regular toolbar

gtk/tk: Ensure no flicker when hovering over images.

Sort 3d sizes along with other properties

Deprecate various vector-backend-specific mathtext helpers.

Copy docstring description from Axes.legend() to Figure.legend()

Build on xcode9

DOC: fix align_xlabels() typo

Fix nbagg in Chrome 84

… into developer