…G generation.

…t-of-pr-17667-on-v3.3.x

Backport PR matplotlib#17667 on branch v3.3.x (Don't linewrap css in svg header.)

…t-of-pr-17668-on-v3.3.x

Backport PR matplotlib#17668 on branch v3.3.x (Don't pass "wrong" `indent=False` in SVG generation.)

…re shaded

…n needs to include cm-super

…t-of-pr-17675-on-v3.3.x

Backport PR matplotlib#17675 on branch v3.3.x (DOC: specify that the LaTeX installation needs to include cm-super)

…t-of-pr-17665-on-v3.3.x

Backport PR matplotlib#17665 on branch v3.3.x (Document that some single char colors are shaded)

…t-of-pr-17664-on-v3.3.x

Backport PR matplotlib#17664 on branch v3.3.x (Clarify docs of AutoDateLocator.intervald)

…t-of-pr-17676-on-v3.3.x

Backport PR matplotlib#17676 on branch v3.3.x (FIX: correctly process the tick label size)

…t-of-pr-17680-on-v3.3.x

Backport PR matplotlib#17680 on branch v3.3.x (MNT: migrate away from deprecated c-api)

…t-of-pr-17686-on-v3.3.x

Backport PR matplotlib#17686 on branch v3.3.x (Fix tooltip for wx toolbar.)

…ooltip texts.

…t-of-pr-17687-on-v3.3.x

Backport PR matplotlib#17687 on branch v3.3.x (Mention keyboard modifiers in toolbar tooltip texts.)

…ng Figure.

…integer inputs.

…t-of-pr-17705-on-v3.3.x

Backport PR matplotlib#17705 on branch v3.3.x (Keep cachedRenderer as None when pickling Figure.)

…t-of-pr-17715-on-v3.3.x

Backport PR matplotlib#17715 on branch v3.3.x (Clarify gridspec error message for non-integer inputs.)

…ng PDF docs.

…t-of-pr-17693-on-v3.3.x

Backport PR matplotlib#17693 on branch v3.3.x (DOC: Add svg2pdf converter for generating PDF docs.)

…t-of-pr-17720-on-v3.3.x

Backport PR matplotlib#17720 on branch v3.3.x (Fix check for manager = None.)

…tribute.

…t-of-pr-17729-on-v3.3.x

Backport PR matplotlib#17729 on branch v3.3.x (Fix type doc for scroll event "step" attribute.)

…t-of-pr-17734-on-v3.3.x

Backport PR matplotlib#17734 on branch v3.3.x (Oversample thumbnail x2)

…t-of-pr-18227-on-v3.3.x

Backport PR matplotlib#18227 on branch v3.3.x (Set pipefail when running flake8 linter.)

…olbar2 broke custom toolbars

…t-of-pr-18219-on-v3.3.x

Backport PR matplotlib#18219 on branch v3.3.x (Fixes an issue where WxAgg NavigationToolbar2 broke custom toolbars)

…ild requirements.

…t-of-pr-18225-on-v3.3.x

Backport PR matplotlib#18225 on branch v3.3.x (Use certifi when downloading bundled build requirements.)

…t-of-pr-18224-on-v3.3.x

Backport PR matplotlib#18224 on branch v3.3.x (Try out cibuildwheel.)

…toolbar before we touch it

…t-of-pr-18233-on-v3.3.x

Backport PR matplotlib#18233 on branch v3.3.x (Fix cibuildwheel trigger condition.)

…18235-on-v3.3.x

Backport PR matplotlib#18235 on branch v3.3.x

This is the first bugfix release of the 3.3.x series.

This release contains several critical bug-fixes:

* fix docstring import issues when running Python with optimization
* fix `hist` with categorical data, such as with Pandas
* fix install on BSD systems
* fix nbagg compatibility with Chrome 84+
* fix ordering of scatter marker size in 3D plots
* fix performance regression when plotting `Path`s
* fix reading from URL in `imread`
* fix several regressions with new date epoch handling
* fix some bad constrained and tight layout interactions with colorbars
* fix use of customized toolbars in TkAgg and WXAgg backends

So the tarballs from GitHub are stable.