📋 Black-compatible formatting of django

[konstin]

We would like to format the black-user django as closely to black as possible. Below is a list the bugs to be solved and features necessary to reach black compatibility on django. This list is manually curated by checking git diff after cargo run --bin ruff_dev -- format-dev --write django

Larger features

• Formatter: F-Strings (FormattedValue and JoinedStr) #5913 (single biggest diff source)
• Formatter: Attribute and call chains "fluent interface" #5343
• Bytes string formatting #6064

Comment placement

• Formatter: try-except-else comment switches body #5675
• Formatter: Allow comments between and/or and the right hand side #6062
• Formatter: Preserve end-of-line comments in imports #6067

Breakpoints/grouping

• Formatter: Add parentheses around too long strings #6059
• Formatter: Comprehension ifs should break if the comprehension breaks #6063
• Formatter: Break quality check before breaking parentheses #6065
• Formatter: Preserve leading empty lines of indented classes and functions #6066
• Formatter: boolean operator should have equal level #6068
• Formatter: Unicode width is too high #6499
• Formatter: Expands function call after multi-line string #6500
• Break string percent formatting like black #6505
• Formatter: overlong values without breakpoint are never parenthesized #6271

Other

• Remove unnecessary walrus operator parentheses #5781
• Formatter: lambda star argument gets removed #5894
• Preserve single \ in raw string literals #5941
• Formatter: Don't reorder parameters in function calls  #6498
• Measuring LineSuffix when formatting to include trailing comments #5630

[konstin]

i went through the diff again an added some that i previously missed

[MichaReiser]

We don't plan on fixing the following black deviations because we believe that Ruff's formatting is more readable and implementing Black's formatting would require special handling.

• Formatter: Multiline string followed by call expression #6938
• Formatter: % formatting in dictionary keys #6974
• Formatter: % formatting on right side of assignment #6976

[MichaReiser]

@konstin should we close this issue or do you want to do another pass?

[konstin]

I want to shift focus to user reports and prioritize from there