build: switch black to ruff formatter

.pre-commit-config.yaml

@@ -7,13 +7,9 @@ repos:
       - id: check-yaml
       - id: end-of-file-fixer
       - id: trailing-whitespace
-  - repo: "https://github.com/psf/black"
-    rev: 24.10.0
-    hooks:
-      - id: black
-        language_version: python3
   - repo: https://github.com/astral-sh/ruff-pre-commit
     rev: v0.9.1
     hooks:
       - id: ruff
         args: [--fix, --exit-non-zero-on-fix]
+      - id: ruff-format

CONTRIBUTING.md

@@ -88,7 +88,7 @@ curl -LsSf https://astral.sh/uv/install.sh | sh
     uv run make test_all  # run all the tests, report all the errors
     ```
 
-9. Format your code. We use ```black``` for code formatting.
+9. Format your code. We use ```ruff``` for code formatting.
 
     ```bash
     make style

Makefile

@@ -44,11 +44,11 @@ test_failed:  ## only run tests failed the last time.
 	coverage run -m pytest -x -v --last-failed tests
 
 style:	## update code style.
-	uv run --only-dev black ${target_dirs}
+	uv run --only-dev ruff format ${target_dirs}
 
 lint:	## run linters.
 	uv run --only-dev ruff check ${target_dirs}
-	uv run --only-dev black ${target_dirs} --check
+	uv run --only-dev ruff format ${target_dirs} --check
 
 system-deps:	## install linux system deps
 	sudo apt-get install -y libsndfile1-dev

pyproject.toml

@@ -134,7 +134,6 @@ all = [
 
 [dependency-groups]
 dev = [
-    "black==24.10.0",
     "coverage[toml]>=7",
     "pre-commit>=4",
     "pytest>=8",
@@ -232,10 +231,6 @@ max-returns = 7
     "E402", # module level import not at top of file
 ]
 
-[tool.black]
-line-length = 120
-target-version = ['py310']
-
 [tool.coverage.report]
 skip_covered = true
 skip_empty = true