* Reformat with black

* Update flake8 ignores

* Bump flake8 from 4.0.1 to 5.0.4 in /requirements

Bumps [flake8](https://github.com/pycqa/flake8) from 4.0.1 to 5.0.4.
- [Release notes](https://github.com/pycqa/flake8/releases)
- [Commits](https://github.com/pycqa/flake8/compare/4.0.1...5.0.4)

---
updated-dependencies:
- dependency-name: flake8
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* Fix flake8 error

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Mathieu Pillard <mpillard@mozilla.com>

Bumps [coverage](https://github.com/nedbat/coveragepy) from 5.5 to 6.5.0.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](https://github.com/nedbat/coveragepy/compare/coverage-5.5...6.5.0)

---
updated-dependencies:
- dependency-name: coverage
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* Bump jinja2 from 3.0.3 to 3.1.2 in /requirements

Bumps [jinja2](https://github.com/pallets/jinja) from 3.0.3 to 3.1.2.
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/main/CHANGES.rst)
- [Commits](https://github.com/pallets/jinja/compare/3.0.3...3.1.2)

---
updated-dependencies:
- dependency-name: jinja2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

* Remove obsolete jinja2.ext.with_ extension

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Mathieu Pillard <diox@users.noreply.github.com>

* Update doc in light of new mangled name avoidance

https://github.com/django-compressor/django-compressor/pull/1107 moved file-name-mangling avoidance into a `save` override, but the doc suggests calling `_save` which bypassess the new file-name-mangling-avoidance code. Updating a project to use django-compressor 4.0 that had a storages class which followed this doc resulted in mangled-named files appearing in the file system (and ultimately css changes not getting built/deployed, since the changes were in the mangled-name files while the rest of the process was using the "bare" name).

* Update changelog.txt

Bumps [rjsmin](https://github.com/ndparker/rjsmin) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/ndparker/rjsmin/releases)
- [Changelog](https://github.com/ndparker/rjsmin/blob/master/docs/CHANGES)
- [Commits](https://github.com/ndparker/rjsmin/compare/1.2.0...1.2.1)

---
updated-dependencies:
- dependency-name: rjsmin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>