Pelican

* Support inline SVGs; don't treat titles in SVGs as HTML titles
* Add category to feeds (in addition to tags)
* Improve content metadata field docs
* Add docs for including other Markdown/reST files in content

* Fix quick-start docs regarding `pelican --listen`
* Set default listen address to 127.0.0.1
* Add extra/optional Markdown dependency to setup.py
* Use correct SSH port syntax for rsync in tasks.py
* Place all deprecated settings handling together
* Add related project URLs for display on PyPI
* Skip some tests on Windows that can't pass due to filesystem differences

Fix pelican.settings.load_source to avoid caching issues - PR 2621

* Add AutoPub to auto-publish releases on PR merge
* Add CSS classes for reStructuredText figures
* Pass `argv` to Pelican `main` entrypoint
* Set default content status to a blank string rather than `None`

* Live browser reload upon changed files (provided via Invoke task)
* Add `pyproject.toml`, managed by Poetry
* Support for invoking `python -m pelican`
* Add relative source path attribute to content
* Allow directories in `EXTRA_PATH_METADATA`
* Add `all_articles` variable to period pages (for recent posts functionality)
* Improve debug mode output
* Remove blank or duplicate summaries from Atom feed
* Fix bugs in pagination, pelican-import, pelican-quickstart, and feed importer

* Refactor `pelican.server` logging
* Fix bug in which all static files were processed as "draft"
* Bug fixes for Invoke/Makefile automation, Importer, and other miscellanea

If upgrading from 3.7.x or earlier, please note that slug-related settings in 4.0+ use `{slug}` and/or `{lang}` rather than `%s`. If `%s`-style settings are encountered, Pelican will emit a warning and fall back to the default setting. Some user-submitted themes might try to format setting values but fail upon site build with a `TypeError`. In such cases, the theme needs to be updated. For example, instead of `TAG_FEED_ATOM|format(tag.slug)`, use `TAG_FEED_ATOM.format(slug=tag.slug)`