Add paragraph about PDF code of conduct.
Add S3 info
Attempt to fix some failing tests
Fix the PDF core fonts test
[bug correction] triinterpolate is independant of triangulation numbering.
Clear rcParams better
Fix tolerance on rasterize test
Merge pull request #2367 from mdboom/fix-failing-tests

Fix a number of long-failing tests.
Partially fix #2343: Forcibly set the locale to en_US.UTF-8 during tests so that the output will match the baseline images
Merge pull request #2192 from mdboom/code-of-conduct2

Follow the PSF code of conduct
Merge pull request #2335 from andreabedini/patch-5

make sure we only perform absolute imports on loading a backend
Raise tolerance on test_rasterize_dpi
Merge pull request #2368 from mdboom/test/set-locale

Set locale for tests
Typos
Merge pull request #2374 from felipeacsi/master

Doc fix typos
Merge pull request #2374 from felipeacsi/master

Doc fix typos
Merge remote-tracking branch 'upstream/v1.3.x'

Conflicts:
	lib/matplotlib/tests/__init__.py
	lib/matplotlib/tests/test_backend_pdf.py
	lib/matplotlib/tests/test_bbox_tight.py
Fixes #2229: Hatching on line collections in PDF backend works
Fix unit tests.
Corrected use of cbook.warn_deprecated()