Completing and promoting autopep8 parity

[Avasam]

I was thinking recently about some discussions in #7310 concerning a general want to support multiple formatter styles.

A lot of black forks are already included thanks to a few options. But otherwise Ruff won't stray too far from Black in the short term as there's a clear focus and targeted userbase for conversion.

I recently realized that Autopep8 works more like an autofixer for existing rules than a dedicated formatter. And by that logic, Ruff can achieve parity (or improvement over ;) ) Autopep8 simply by including all the relevant autofixes in the linter portion. Claiming Autopep8 parity could help bring in more users who are still on the fence, without adding complexity to the formatter.

As a Ruff+Autopep8 user myself who isn't yet convinced by the Black-like style (although I like a lot of the tweaks and improvements Ruff has over it), I know I would love to be able to drop Autopep8 from my toolchain.

Anyway, what's the point of this topic?

1. Point out that Ruff could profit from claiming (truthfully) parity with Autopep8 as a "formatter". WIth a dedicated low-effort-to-configure preset/profile/rule group (wherever that discussion is going in the future).
2. Should a meta-issue be open for tracking specifically autoformatting that's still missing? Or made as part of Implement remaining pycodestyle rules #2402 (Although Autopep8 has some non pycodestlye-related features https://pypi.org/project/autopep8/#features)

[Avasam]

I went ahead and checked for autopep8 parity in Ruff rules. These are all the missing autofixes:

• E101 - Reindent all lines.
• E11 (E111 - E117) - Fix indentation.
• E121 - Fix indentation to be a multiple of four.
• E122 - Add absent indentation for hanging indentation.
• E123 - Align closing bracket to match opening bracket.
• E124 - Align closing bracket to match visual indentation.
• E125 - Indent to distinguish line from next logical line.
• E126 - Fix over-indented hanging indentation.
• E127 - Fix visual indentation.
• E128 - Fix visual indentation.
• E129 - Fix visual indentation.
• E131 - Fix hanging indent for unaligned continuation line.
• E133 - Fix missing indentation for closing bracket.
• E2 (E201 - E275) - Whitespace
• E3 (E301 - E306) - blank lines [pycodestyle] Add blank line(s) rules (E301, E302, E303, E304, E305, E306) #9266
• E401 - Put imports on separate lines. I001: https://docs.astral.sh/ruff/rules/unsorted-imports/
• E402 - Fix module level import not at top of file
• E501 - Try to make lines fit within --max-line-length characters.
• E502 - Remove extraneous escape of newline. [pycodestyle] Implement redundant-backslash (E502) #10292
• E701 - Put colon-separated compound statement on separate lines.
• E703 - statement ends with a semicolon
• E70 (E702 & E704) - Put semicolon-separated compound statement on separate lines.
• E71 (E711 - E714) - Statement (comparisons)
• E721 - Use "isinstance()" instead of comparing types directly.
• E722 - Fix bare except.
• E731 - Use a def when use do not assign a lambda expression.
• W29 (W291 -W293) - Whitespace warning
• W391 - Remove trailing blank lines. [pycodestyle] Implement blank-line-at-end-of-file (W391) #10243
• W503 - Fix line break before binary operator. ignored by default flake8's (W503 and) W504 #4125
• W504 - Fix line break after binary operator. ignored by default flake8's (W503 and) W504 #4125
• W605 - Fix invalid escape sequence 'x'.
• W690 - Fix various deprecated code (via lib2to3). UP: https://docs.astral.sh/ruff/rules/#pyupgrade-up
• "Normalize files with mixed line endings." https://docs.astral.sh/ruff/settings/#format-line-ending in formatter only so it doesn't count here. But honestly there's enough separate tooling (including pre-commit.ci, and the dev's own editor) that can take care of this.
• "Put a blank line between a class docstring and its first method declaration." (Enabled with E301 in autopep8) D204: https://docs.astral.sh/ruff/rules/one-blank-line-after-class/
• "Remove blank lines between a function declaration and its docstring." (Enabled with E303 in autopep8) D201: https://docs.astral.sh/ruff/rules/no-blank-line-before-function/