update to sphinx theme master 2.0.0

[khancyr]

• 2.0 milestone: drop supported versions

The new policy is:

• Python >=3.6
• Sphinx >= 5
• HTML4 and HTML5 writer
• docutils >= 0.14, < 0.19

• Update roadmap after discussion

By the beginning of 2024 we should support newer Sphinx versions and HTML5 only.

• Remove Python 2.7 from CircleCI

• Run only supported versions on Python 3.11

• Update with feedback from review

• Update documentation to match our support

• Add Sphinx 6.2 that was missing

• Update tox/circleci to work

• Revert tox command

• Drop support for HTML4 and keep -qa testing

• drop support for HTML4 on 2.0
• keep -qa TOX environment to be able to compare feature branches
• emit logger.errors on Python 2 and html_writer4=True
• require Sphinx >= 5.0
• remove logic for old Sphinx versions

• Update Tox and CircleCI

• Update contributing page to match our plans

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Co-authored-by: Anthony Johnson aj@ohess.org

Release 2.0.0rc1 (readthedocs#1510)

• Release 2.0.0rc1

• Update npm lock file

Bump to next release 2.0.0rc2 (readthedocs#1511)

Docs: Remove "git install" method from instructions (readthedocs#1375)

• Remove instructions "encouraging" to install directly from git

• Update changelog: Add reminder that people should not install directly from git

• Update docs/changelog.rst

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Co-authored-by: Manuel Kaufmann humitos@gmail.com

Visual test with Firefox and tox (readthedocs#1513)

• Visual test with Firefox and tox

Allows developer to run

tox -e py310-sphinx72-firefox

This will run the tests and open a Firefox after building the demo site showing the demo/demo.html page on it.

Then, you can also run:

tox -e py310-sphinx61-firefox

and compare the visual differences.

Idea copied from readthedocs#1388
Closes readthedocs#1388

• Default value for DISPLAY and --new-tab

• Simplify the idea :)

Remove Python2 leftovers (readthedocs#1514)

Docs: update Read the Docs config (readthedocs#1518)

Use the latest config file style.

Set data-content_root for Sphinx ≥ 7.2 (readthedocs#1507)

This attribute is now required by searchtools.js:
https://github.com/sphinx-doc/sphinx/blob/v7.2.2/sphinx/themes/basic/static/searchtools.js#L65

When it's not set, loading search results via AJAX will be broken because the JS code will attempt to load paths like /undefinedfoo.html.

Co-authored-by: Manuel Kaufmann humitos@gmail.com

Use css_tag helper to inject CSS files (readthedocs#1519)

• Use css_tag helper to inject CSS files

• Typo

Add support for docutils==0.20.x (readthedocs#1517)

Closes readthedocs#1516

Release 2.0rc2 (readthedocs#1520)

Version bump for 2.0rc3 development (readthedocs#1521)

Next development version is 2.0rc3 for now, but more likely 2.1rc1

Fix readthedocs#1522: fix 'str' object has no attribute 'attributes' (readthedocs#1528)

• Fix Error with 2.0.0rc2: AttributeError("'str' object has no attribute 'attributes'") readthedocs/sphinx_rtd_theme#1522: fix attribute error if css is str

• Revert "Fix Error with 2.0.0rc2: AttributeError("'str' object has no attribute 'attributes'") readthedocs/sphinx_rtd_theme#1522: fix attribute error if css is str"

This reverts commit b22a77f.

• Use css_tag only for standard CSS files from Sphinx

... and keep using the custom link HTML tag for CSS files included via the HTML theme option extra_css_files.

• Normalize template variables

---

Co-authored-by: Manuel Kaufmann humitos@gmail.com
Co-authored-by: Anthony Johnson aj@ohess.org

Release 2.0.0rc3 (readthedocs#1535)

Increment for next potential release (readthedocs#1536)

Fix AttributeError when one of css_files is a string (readthedocs#1537)

Fix AttributeError when one of css_files is a string

Release 2.0.0rc4 (readthedocs#1538)

Bump for next potential release, 2.0.0rc5 (readthedocs#1539)

Release 2.0 final (readthedocs#1544)