chore(deps): update pre-commit hook psf/black to v26.10.0 #67

2026-10-09T02:00:14+02:00

Renovate commented

2026-10-09 02:00:14 +02:00

This PR contains the following updates:

Package	Type	Update	Change
psf/black	repository	minor	`26.5.1` → `26.10.0`

Note: The pre-commit manager in Renovate is not supported by the pre-commit maintainers or community. Please do not report any problems there, instead create a Discussion in the Renovate repository if you have any questions.

Release Notes

psf/black (psf/black)

`v26.10.0`

Compare Source

Stable style

--line-ranges no longer inserts an empty line after a docstring when the range
covers only the docstring itself (#5312)
Fix # fmt: skip on a bracketed ternary turning the surrounding tuple into a call
(#5464)
Fix crash when # fmt: skip is placed on a one-line function or class with PEP 695
type parameters (#5429)
Fix an inline comment after the closing bracket of optional parentheses being moved
inside the parentheses when the parenthesized expression contains own-line comments
(#5395)
Fix unparseable output when # fmt: skip is placed on a bracket of an if, while,
for, or with header (#5401, #5405)
Fix crash when formatting parenthesized expressions with multiple inline comments and
# fmt: skip (#5414)
Fix parsing Jupyter notebook assignment magics when non-ASCII characters appear
earlier on the line (#5381)
Preserve blank lines that come immediately before a # fmt: on comment (#5300)
Keep the parentheses around the target of an annotated assignment (e.g.
(x): int = 5), which prevent CPython from including the name in __annotations__
(#5321)
Stop treating a t-string in docstring position as a docstring (e.g. t" spam " as
the first statement of a module, class or function) (#5287)
Fix unparseable output for a t-string whose replacement field contains a quote (e.g.
t'\'{a["b"]}\'') (#5265)
Fix unparseable output for a triple-quoted string whose body ends in an
already-escaped double quote (e.g. '''\'''\"''') (#5262)
Fix --skip-magic-trailing-comma dropping the trailing comma from a split
single-element tuple used as a lambda parameter default (#5246)
Fix unstable formatting when an inline comment sits on optional parentheses (e.g. a
parenthesized assert message) (#5241)
Fix --skip-magic-trailing-comma dropping the trailing comma of a one-element
subscript (a[x,]) when the line is long enough to be split and contains a power
operator (#5272)
Fix crash when a standalone comment sits between tokens of a comprehension or lambda
(#5144)
Fix inline comments on a bracket inside a comprehension being dropped (#5330)
Respect the magic trailing comma in a PEP 695 type parameter list containing a
*TypeVarTuple or **ParamSpec (#5244)
Fix crash when a comment-only # fmt: off/# fmt: on block is followed by a with
statement after another standalone comment (#5189)
Fix a crash when splitting case case if ... match patterns at very small line
lengths (#5147)
Fix multiline docstring indentation when leading tabs are used inside indented
docstrings (#5148)
Respect # fmt: skip on a line that opens a bracket (e.g.
from x import ( # fmt: skip) when a standalone comment is among the bracket's
contents (#5161)
Fix an AST safety error when separate # type: ignore comments in a parenthesized
attribute chain were merged onto one physical line (#5297)
Preserve comments and blank lines outside requested ranges when formatting with
--line-ranges (#5175)
Fix crash when # fmt: skip is used on one-line async def, async with, and
async for statements containing a semicolon (#5311)
Stop converting form feeds or other similar characters in docstrings into newlines
(#5461)
Fix --skip-source-first-line turning the skipped line's CRLF ending into \r\r\n
when reformatting a file with CRLF line endings (#5438)

Preview style

New preview features

Add missing blank lines after classes whose last method has an ellipsis body (#5439)
Split only the brackets holding a magic trailing comma when more trailers follow them
(e.g. stop splitting inside the [2] of [1,][2](3)) (#5448)
Keep dictionary keys containing operators together on one line when the value can be
wrapped onto a new line instead (#5435)
Remove redundant parentheses around individual variables in unpacking targets (e.g.
for (x), (y) in points: becomes for x, y in points:) (#5416)
Normalize uppercase T prefixes on t-strings to lowercase (#5425)
Remove redundant parentheses around generator expressions (#5304, #5369)
Preserve two blank lines before a top-level class starting inside a # fmt: off block
after an import (#5238)
Fix unnecessary parentheses around short right-hand expressions in indexed assignments
(e.g. x[key] = expr) (#5095)
Parenthesize tuple expressions in yield statements for consistency with function
calls and returns (#5170)
Stop splitting between a variable and its operator (not in, ==, is, ...) when
the right-hand side is a bracketed expression, and instead split inside the brackets
(#5135)
In .pyi stub files, enforce a blank line after a function or method that has a
docstring-only body when another comment or statement follows it (#5158)

Updates to existing preview features

Fix crash in stub files when # fmt: skip is placed on a function in a group of
same-name decorated functions (e.g. @overloads or a property setter) (#5430)
Keep the parentheses around a lambda used as the iterable of a comprehension (e.g.
[x for x in (lambda: 0) if x]) (#5176, #5200)

Updates to existing unstable features

Do not treat multi-line expressions with merged strings and trailing # type: ignore
comments as single-line unsplittable expressions (#5466)
Fix duplicated inline comment when stripping the parentheses around a string or
merging a backslash-continued string on the same line (#5449)
Split long stringified return annotations even when the function has parameters
(#5427)
Don't hug brackets when doing so would join two # type: ignore comments onto one
line (#5271)
Fix a crash when # type: ignore is lost during formatting of a long parenthesized
string (#5329)
Fix only the first part of an implicitly concatenated unmergeable string (e.g.
r"..." r"...") being wrapped in parentheses (#5434)

Configuration

Add support for NO_COLOR environment variable to disable ANSI output (#5129)
Remove spurious target version warning when runtime version is included in a
--target-version flag (#5167)
Fix --force-exclude not excluding files whose path contains .. (e.g.
black ../generated/file.py run from a subdirectory) (#5471)
Fall back to the default configuration, with a warning, when the given sources share
no common project root (e.g. they are on different drives on Windows) instead of
crashing (#5386)
Fix loading a stale cached pyproject.toml path when --code is used from different
working directories in the same process (#5152)
Add validation for --line-ranges values (#5107)
Ignore empty cache files instead of raising an EOFError (#5192)
Reject non-string include and force-exclude values in pyproject.toml (#5193)
Validate BLACK_NUM_WORKERS values and report invalid values as usage errors instead
of crashing (#5211)
Ignore permission errors when reading cache (#5258)

Packaging

Reduce the size of Linux standalone binaries by stripping debug symbols during the
PyInstaller release build (#5223)
Black is now released using GitHub
Immutable Releases
(#5296)

Performance

Fix superlinear runtime growth with the number of input files (#5450)
Improve performance on strings containing many consecutive backslashes (#5163)
Improve performance on files with many # fmt: skip/# fmt: off/# fmt: on comments
(#5169, #5190, #5232)
Improve performance on long calls and collections (#5177)
Improve performance on multiline strings inside large collections (e.g. a dict literal
with triple-quoted strings as values) (#5188)
Improve performance on files with many soft keywords (e.g. match/case blocks)
(#5186)
Improve performance on long semicolon-separated statements (in the stable style) and
large dict literals (in --preview) (#5184)
Improve performance of --line-ranges on files with many sibling blocks (a long
if/elif chain, a match with many cases, or many top-level definitions) (#5213)
Improve performance on deeply nested bracketed expressions (#5171, #5242)
Improve performance on lists and subscripts holding one long expression without
operators (e.g. a long run of implicitly concatenated strings inside []) (#5239)
Improve performance on deeply chained operations (e.g. a long a ** b ** c ** ...
chain) (#5235)
Improve performance on long if/elif chains and other compound statements with many
clauses (#5322)
Improve performance of string_processing:
- when merging implicitly concatenated f-strings containing long string literals
  (#5165)
- when merging long implicitly concatenated strings (#5173, #5194)
- when rewriting large nodes (e.g. "%s ..." % (a, b, c, ...)) (#5178, #5199, #5220)
- when splitting long string literals (#5183)

Output

Report parser failures using editor-friendly path:line:column locations (#5237)
Fix crash when writing formatted code or diffs to a sys.stdout that has no buffer
attribute (e.g. in Jupyter notebooks) (#5411)
Report parse failures on Black's own output as internal errors (#5383)

Blackd

Return HTTP 400 instead of 500 when the X-Python-Variant header is empty or has an
empty entry (e.g. a trailing comma) (#5428)
Allow optional whitespace around comma-separated versions and pyi in the
X-Python-Variant header (#5441)

Integrations

Remove unused migrate-black script (#5319)
Support PEP 440 version specifiers in tool.black.required-version for the GitHub
Action (#5399)
Add outputs (is_formatted, change_count, same_count, failure_count) to GitHub
Action runs (#5408)

Documentation

Document vim-python-pep8-indent, which provides an indentexpr for Black-style
insert-mode indentation (#5288)

Configuration

📅 Schedule: (UTC)

Branch creation
- "on friday"
Automerge
- At any time (no schedule defined)

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

If you want to rebase/retry this PR, check this box

This PR has been generated by Mend Renovate CLI.

This PR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [psf/black](https://github.com/psf/black) | repository | minor | `26.5.1` → `26.10.0` | Note: The `pre-commit` manager in Renovate is not supported by the `pre-commit` maintainers or community. Please do not report any problems there, instead [create a Discussion in the Renovate repository](https://github.com/renovatebot/renovate/discussions/new) if you have any questions. --- ### Release Notes <details> <summary>psf/black (psf/black)</summary> ### [`v26.10.0`](https://github.com/psf/black/blob/HEAD/CHANGES.md#Version-26100) [Compare Source](https://github.com/psf/black/compare/26.5.1...26.10.0) ##### Stable style - `--line-ranges` no longer inserts an empty line after a docstring when the range covers only the docstring itself ([#5312](https://github.com/psf/black/issues/5312)) - Fix `# fmt: skip` on a bracketed ternary turning the surrounding tuple into a call ([#5464](https://github.com/psf/black/issues/5464)) - Fix crash when `# fmt: skip` is placed on a one-line function or class with PEP 695 type parameters ([#5429](https://github.com/psf/black/issues/5429)) - Fix an inline comment after the closing bracket of optional parentheses being moved inside the parentheses when the parenthesized expression contains own-line comments ([#5395](https://github.com/psf/black/issues/5395)) - Fix unparseable output when `# fmt: skip` is placed on a bracket of an `if`, `while`, `for`, or `with` header ([#5401](https://github.com/psf/black/issues/5401), [#5405](https://github.com/psf/black/issues/5405)) - Fix crash when formatting parenthesized expressions with multiple inline comments and `# fmt: skip` ([#5414](https://github.com/psf/black/issues/5414)) - Fix parsing Jupyter notebook assignment magics when non-ASCII characters appear earlier on the line ([#5381](https://github.com/psf/black/issues/5381)) - Preserve blank lines that come immediately before a `# fmt: on` comment ([#5300](https://github.com/psf/black/issues/5300)) - Keep the parentheses around the target of an annotated assignment (e.g. `(x): int = 5`), which prevent CPython from including the name in `__annotations__` ([#5321](https://github.com/psf/black/issues/5321)) - Stop treating a t-string in docstring position as a docstring (e.g. `t" spam "` as the first statement of a module, class or function) ([#5287](https://github.com/psf/black/issues/5287)) - Fix unparseable output for a t-string whose replacement field contains a quote (e.g. `t'\'{a["b"]}\''`) ([#5265](https://github.com/psf/black/issues/5265)) - Fix unparseable output for a triple-quoted string whose body ends in an already-escaped double quote (e.g. `'''\'''\"'''`) ([#5262](https://github.com/psf/black/issues/5262)) - Fix `--skip-magic-trailing-comma` dropping the trailing comma from a split single-element tuple used as a lambda parameter default ([#5246](https://github.com/psf/black/issues/5246)) - Fix unstable formatting when an inline comment sits on optional parentheses (e.g. a parenthesized assert message) ([#5241](https://github.com/psf/black/issues/5241)) - Fix `--skip-magic-trailing-comma` dropping the trailing comma of a one-element subscript (`a[x,]`) when the line is long enough to be split and contains a power operator ([#5272](https://github.com/psf/black/issues/5272)) - Fix crash when a standalone comment sits between tokens of a comprehension or lambda ([#5144](https://github.com/psf/black/issues/5144)) - Fix inline comments on a bracket inside a comprehension being dropped ([#5330](https://github.com/psf/black/issues/5330)) - Respect the magic trailing comma in a PEP 695 type parameter list containing a `*TypeVarTuple` or `**ParamSpec` ([#5244](https://github.com/psf/black/issues/5244)) - Fix crash when a comment-only `# fmt: off`/`# fmt: on` block is followed by a `with` statement after another standalone comment ([#5189](https://github.com/psf/black/issues/5189)) - Fix a crash when splitting `case case if ...` match patterns at very small line lengths ([#5147](https://github.com/psf/black/issues/5147)) - Fix multiline docstring indentation when leading tabs are used inside indented docstrings ([#5148](https://github.com/psf/black/issues/5148)) - Respect `# fmt: skip` on a line that opens a bracket (e.g. `from x import ( # fmt: skip`) when a standalone comment is among the bracket's contents ([#5161](https://github.com/psf/black/issues/5161)) - Fix an AST safety error when separate `# type: ignore` comments in a parenthesized attribute chain were merged onto one physical line ([#5297](https://github.com/psf/black/issues/5297)) - Preserve comments and blank lines outside requested ranges when formatting with `--line-ranges` ([#5175](https://github.com/psf/black/issues/5175)) - Fix crash when `# fmt: skip` is used on one-line `async def`, `async with`, and `async for` statements containing a semicolon ([#5311](https://github.com/psf/black/issues/5311)) - Stop converting form feeds or other similar characters in docstrings into newlines ([#5461](https://github.com/psf/black/issues/5461)) - Fix `--skip-source-first-line` turning the skipped line's CRLF ending into `\r\r\n` when reformatting a file with CRLF line endings ([#5438](https://github.com/psf/black/issues/5438)) ##### Preview style ##### New preview features - Add missing blank lines after classes whose last method has an ellipsis body ([#5439](https://github.com/psf/black/issues/5439)) - Split only the brackets holding a magic trailing comma when more trailers follow them (e.g. stop splitting inside the `[2]` of `[1,][2](3)`) ([#5448](https://github.com/psf/black/issues/5448)) - Keep dictionary keys containing operators together on one line when the value can be wrapped onto a new line instead ([#5435](https://github.com/psf/black/issues/5435)) - Remove redundant parentheses around individual variables in unpacking targets (e.g. `for (x), (y) in points:` becomes `for x, y in points:`) ([#5416](https://github.com/psf/black/issues/5416)) - Normalize uppercase `T` prefixes on t-strings to lowercase ([#5425](https://github.com/psf/black/issues/5425)) - Remove redundant parentheses around generator expressions ([#5304](https://github.com/psf/black/issues/5304), [#5369](https://github.com/psf/black/issues/5369)) - Preserve two blank lines before a top-level class starting inside a `# fmt: off` block after an import ([#5238](https://github.com/psf/black/issues/5238)) - Fix unnecessary parentheses around short right-hand expressions in indexed assignments (e.g. `x[key] = expr`) ([#5095](https://github.com/psf/black/issues/5095)) - Parenthesize tuple expressions in `yield` statements for consistency with function calls and returns ([#5170](https://github.com/psf/black/issues/5170)) - Stop splitting between a variable and its operator (`not in`, `==`, `is`, ...) when the right-hand side is a bracketed expression, and instead split inside the brackets ([#5135](https://github.com/psf/black/issues/5135)) - In `.pyi` stub files, enforce a blank line after a function or method that has a docstring-only body when another comment or statement follows it ([#5158](https://github.com/psf/black/issues/5158)) ##### Updates to existing preview features - Fix crash in stub files when `# fmt: skip` is placed on a function in a group of same-name decorated functions (e.g. `@overload`s or a property setter) ([#5430](https://github.com/psf/black/issues/5430)) - Keep the parentheses around a lambda used as the iterable of a comprehension (e.g. `[x for x in (lambda: 0) if x]`) ([#5176](https://github.com/psf/black/issues/5176), [#5200](https://github.com/psf/black/issues/5200)) ##### Updates to existing unstable features - Do not treat multi-line expressions with merged strings and trailing `# type: ignore` comments as single-line unsplittable expressions ([#5466](https://github.com/psf/black/issues/5466)) - Fix duplicated inline comment when stripping the parentheses around a string or merging a backslash-continued string on the same line ([#5449](https://github.com/psf/black/issues/5449)) - Split long stringified return annotations even when the function has parameters ([#5427](https://github.com/psf/black/issues/5427)) - Don't hug brackets when doing so would join two `# type: ignore` comments onto one line ([#5271](https://github.com/psf/black/issues/5271)) - Fix a crash when `# type: ignore` is lost during formatting of a long parenthesized string ([#5329](https://github.com/psf/black/issues/5329)) - Fix only the first part of an implicitly concatenated unmergeable string (e.g. `r"..." r"..."`) being wrapped in parentheses ([#5434](https://github.com/psf/black/issues/5434)) ##### Configuration - Add support for `NO_COLOR` environment variable to disable ANSI output ([#5129](https://github.com/psf/black/issues/5129)) - Remove spurious target version warning when runtime version is included in a `--target-version` flag ([#5167](https://github.com/psf/black/issues/5167)) - Fix `--force-exclude` not excluding files whose path contains `..` (e.g. `black ../generated/file.py` run from a subdirectory) ([#5471](https://github.com/psf/black/issues/5471)) - Fall back to the default configuration, with a warning, when the given sources share no common project root (e.g. they are on different drives on Windows) instead of crashing ([#5386](https://github.com/psf/black/issues/5386)) - Fix loading a stale cached `pyproject.toml` path when `--code` is used from different working directories in the same process ([#5152](https://github.com/psf/black/issues/5152)) - Add validation for `--line-ranges` values ([#5107](https://github.com/psf/black/issues/5107)) - Ignore empty cache files instead of raising an `EOFError` ([#5192](https://github.com/psf/black/issues/5192)) - Reject non-string `include` and `force-exclude` values in `pyproject.toml` ([#5193](https://github.com/psf/black/issues/5193)) - Validate `BLACK_NUM_WORKERS` values and report invalid values as usage errors instead of crashing ([#5211](https://github.com/psf/black/issues/5211)) - Ignore permission errors when reading cache ([#5258](https://github.com/psf/black/issues/5258)) ##### Packaging - Reduce the size of Linux standalone binaries by stripping debug symbols during the PyInstaller release build ([#5223](https://github.com/psf/black/issues/5223)) - Black is now released using GitHub [Immutable Releases](https://docs.github.com/code-security/concepts/supply-chain-security/immutable-releases) ([#5296](https://github.com/psf/black/issues/5296)) ##### Performance - Fix superlinear runtime growth with the number of input files ([#5450](https://github.com/psf/black/issues/5450)) - Improve performance on strings containing many consecutive backslashes ([#5163](https://github.com/psf/black/issues/5163)) - Improve performance on files with many `# fmt: skip`/`# fmt: off`/`# fmt: on` comments ([#5169](https://github.com/psf/black/issues/5169), [#5190](https://github.com/psf/black/issues/5190), [#5232](https://github.com/psf/black/issues/5232)) - Improve performance on long calls and collections ([#5177](https://github.com/psf/black/issues/5177)) - Improve performance on multiline strings inside large collections (e.g. a dict literal with triple-quoted strings as values) ([#5188](https://github.com/psf/black/issues/5188)) - Improve performance on files with many soft keywords (e.g. `match`/`case` blocks) ([#5186](https://github.com/psf/black/issues/5186)) - Improve performance on long semicolon-separated statements (in the stable style) and large dict literals (in `--preview`) ([#5184](https://github.com/psf/black/issues/5184)) - Improve performance of `--line-ranges` on files with many sibling blocks (a long `if`/`elif` chain, a `match` with many cases, or many top-level definitions) ([#5213](https://github.com/psf/black/issues/5213)) - Improve performance on deeply nested bracketed expressions ([#5171](https://github.com/psf/black/issues/5171), [#5242](https://github.com/psf/black/issues/5242)) - Improve performance on lists and subscripts holding one long expression without operators (e.g. a long run of implicitly concatenated strings inside `[]`) ([#5239](https://github.com/psf/black/issues/5239)) - Improve performance on deeply chained operations (e.g. a long `a ** b ** c ** ...` chain) ([#5235](https://github.com/psf/black/issues/5235)) - Improve performance on long `if`/`elif` chains and other compound statements with many clauses ([#5322](https://github.com/psf/black/issues/5322)) - Improve performance of `string_processing`: - when merging implicitly concatenated f-strings containing long string literals ([#5165](https://github.com/psf/black/issues/5165)) - when merging long implicitly concatenated strings ([#5173](https://github.com/psf/black/issues/5173), [#5194](https://github.com/psf/black/issues/5194)) - when rewriting large nodes (e.g. `"%s ..." % (a, b, c, ...)`) ([#5178](https://github.com/psf/black/issues/5178), [#5199](https://github.com/psf/black/issues/5199), [#5220](https://github.com/psf/black/issues/5220)) - when splitting long string literals ([#5183](https://github.com/psf/black/issues/5183)) ##### Output - Report parser failures using editor-friendly `path:line:column` locations ([#5237](https://github.com/psf/black/issues/5237)) - Fix crash when writing formatted code or diffs to a `sys.stdout` that has no `buffer` attribute (e.g. in Jupyter notebooks) ([#5411](https://github.com/psf/black/issues/5411)) - Report parse failures on Black's own output as internal errors ([#5383](https://github.com/psf/black/issues/5383)) ##### *Blackd* - Return HTTP 400 instead of 500 when the `X-Python-Variant` header is empty or has an empty entry (e.g. a trailing comma) ([#5428](https://github.com/psf/black/issues/5428)) - Allow optional whitespace around comma-separated versions and `pyi` in the `X-Python-Variant` header ([#5441](https://github.com/psf/black/issues/5441)) ##### Integrations - Remove unused `migrate-black` script ([#5319](https://github.com/psf/black/issues/5319)) - Support PEP 440 version specifiers in `tool.black.required-version` for the GitHub Action ([#5399](https://github.com/psf/black/issues/5399)) - Add outputs (`is_formatted`, `change_count`, `same_count`, `failure_count`) to GitHub Action runs ([#5408](https://github.com/psf/black/issues/5408)) ##### Documentation - Document `vim-python-pep8-indent`, which provides an `indentexpr` for Black-style insert-mode indentation ([#5288](https://github.com/psf/black/issues/5288)) </details> --- ### Configuration 📅 **Schedule**: (UTC) - Branch creation - "on friday" - Automerge - At any time (no schedule defined) 🚦 **Automerge**: Enabled. ♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Mend Renovate CLI](https://github.com/renovatebot/renovate).

Renovate scheduled this pull request to auto merge when all checks succeed 2026-10-09 02:00:15 +02:00

Renovate added 1 commit 2026-10-09 03:15:25 +02:00

chore(deps): update pre-commit hook psf/black to v26.10.0

renovate/stability-days Updates have met minimum release age requirement

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Philipp/Global-Workflows: Pre-commit Lint (Scoped) / pre-commit (pull_request) Successful in 3m43s

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82ea97352c

Renovate force-pushed renovate/psf-black-26.x from 942315b9e5 to 82ea97352c

2026-10-09 03:15:25 +02:00

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Renovate merged commit 12d8d4b32e into main

2026-10-09 03:25:21 +02:00

Renovate deleted branch renovate/psf-black-26.x

2026-10-09 03:25:21 +02:00

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Reference: Philipp/template-git#67