chore(deps): update dependency ruff to v0.15.20

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
ruff (source, changelog)	==0.15.16 → ==0.15.20

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Release Notes

astral-sh/ruff (ruff)

v0.15.20

Compare Source

Released on 2026-06-25.

Preview features

• Allow human-readable names in rule selectors (#​25887)
• Emit a warning instead of an error for unknown rule selectors (#​26113)
• Match noqa shebang handling in ruff:ignore comments (#​26286)
• [ruff] Remove pytest-fixture-autouse (RUF076) (#​26240, #​26371)

Documentation

• Add versioning sections to custom crate READMEs (#​26317)
• Update ruff_python_parser README for crates.io (#​26315)
• [perflint] Clarify that PERF402 applies to any iterable (#​26242)

Contributors

• @​dhruvmanila
• @​MichaReiser
• @​ntBre
• @​trilamsr

v0.15.19

Compare Source

Released on 2026-06-23.

Preview features

• Support human-readable names when hovering suppression comments and in code actions (#​26114)

Bug fixes

• Fall back to default settings when editor-only settings are invalid (#​26244)
• Fix panic when inserting text at a notebook cell boundary (#​26111)

Rule changes

• [pylint] Update fix suggestions for __floor__, __trunc__, __length_hint__, and __matmul__ variants (PLC2801) (#​26239)

Performance

• Avoid allocating when parsing single string literals (#​26200)
• Avoid reallocating singleton call arguments (#​26223)
• Lazily create source files for lint diagnostics (#​26226)
• Optimize formatter text width and indentation (#​26236)
• Reserve capacity for builtin bindings (#​26229)
• Skip repeated-key checks for singleton dictionaries (#​26228)
• Use ArrayVec for qualified name segments (#​26224)

Documentation

• [flake8-pyi] Note that PYI051 is an opinionated stylistic rule (#​26179)
• [pyupgrade] Clarify UP029 as a Python 2 compatibility rule (#​26243)

Other changes

• Publish Ruff crates to crates.io (#​26271)

Contributors

• @​MakenRosa
• @​MichaReiser
• @​trilamsr
• @​ntBre
• @​sanjibani
• @​charliermarsh

v0.15.18

Compare Source

Released on 2026-06-18.

Preview features

• Handle nested ruff:ignore comments (#​25791)
• Stop displaying severity in output (#​26050)
• Use human-readable names in CLI output (#​25937)
• Use human-readable names in LSP and playground diagnostics (#​26058)
• [pydocstyle] Prevent property docstrings starting with verbs (D421) (#​23775)
• [flake8-pyi] Extend PYI033 to Python files (#​26129)

Bug fixes

• Detect equivalent numeric mapping keys (#​26009)
• Detect mapping keys equivalent to booleans (#​25982)
• Detect repeated signed and complex dictionary keys (#​26007)

Rule changes

• [flake8-pyi] Rename PYI033 to legacy-type-comment (#​26131)

Performance

• Use ThinVec for call keywords (#​25999)
• Inline parser recovery context checks (#​26038)
• Match parser keywords as bytes (#​26037)
• Move value parsing out of lexing (#​25360)

Server

• Render subdiagnostics and secondary annotations as related information (#​26011)

Documentation

• Update fix availability for always-fixable rules (#​26091)
• [flake8-tidy-imports] Add fix safety section (TID252) (#​17491)

Parser

• Reject __debug__ lambda parameters (#​26022)
• Reject _ as a match-pattern target (#​25977)
• Reject multiple starred names in sequence patterns (#​25976)
• Reject parenthesized star imports (#​26021)
• Reject starred comprehension targets (#​26023)
• Reject unparenthesized generator expressions in class bases (#​25978)
• Reject yield expressions after commas (#​26024)
• Validate function type parameter default order (#​25981)

Playground

• Make diagnostic links clickable (#​26104)
• Use diagnostic tags (#​26105)

Contributors

• @​AlexWaygood
• @​ntBre
• @​gtkacz
• @​MichaReiser
• @​charliermarsh
• @​Kalmaegi

v0.15.17

Compare Source

Released on 2026-06-11.

Preview features

• Allow human-readable names in suppression comments (#​25614)
• Fix handling of ignore comments within a disable/enable pair (#​25845)
• Prioritize human-readable names in CLI output (#​25869)
• Respect diagnostic start and parent ranges and trailing comments in ruff:ignore suppressions (#​25673)
• [flake8-async] Add trio.as_safe_channel to safe decorators (ASYNC119) (#​25775)
• [flake8-pytest-style] Also check pytest_asyncio fixtures (#​25375)
• [ruff] Ban pytest autouse fixtures (RUF076) (#​25477)
• [pyupgrade] Add from __future__ import annotations automatically (UP007, UP045) (#​23259)

Bug fixes

• Fix diagnostic when ruff:enable or ruff:disable appears where ruff:ignore is expected (#​25700)
• [pyupgrade] Preserve leading empty literals to avoid syntax errors (UP032) (#​25491)

Rule changes

• [flake8-pytest-style] Clarify diagnostic message for single parameters (PT007) (#​25592)
• [numpy] Drop autofix for np.in1d (NPY201) (#​25612)
• [pylint] Exempt Python version comparisons (PLR2004) (#​25743)

Performance

• Reserve AST Vecs with correct capacity for common cases (#​25451)

Formatter

• Preserve whitespace for Quarto cell option comments (#​25641)

CLI

• Allow rule names in ruff rule (#​25640)

Other changes

• Fix playground diagnostics scrollbars (#​25642)

Contributors

• @​SuryanshSS1011
• @​anishgirianish
• @​romero-deshaw
• @​karlhillx
• @​carljm
• @​ntBre
• @​11happy
• @​Kilo59
• @​oconnor663
• @​LeonidasZhak
• @​DavisVaughan
• @​MeGaGiGaGon
• @​jonathandung
• @​MichaReiser
• @​brianmego

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