maint: migrate from black to ruff format

Makefile

@@ -1,4 +1,4 @@
-.PHONY: clean clean-build clean-pyc clean-test coverage dist docs help install lint lint/flake8 lint/black
+.PHONY: clean clean-build clean-pyc clean-test coverage dist docs help install lint lint/flake8 lint/format-checkformat-check
 .DEFAULT_GOAL := help
 
 define BROWSER_PYSCRIPT
@@ -58,12 +58,10 @@ lint/flake8: ## check style with flake8
 	ruff check src tests
 	flake8 --config=.flake8 xncml tests
 
-lint/black: ## check style with black
-	black --check src/xncml tests
-	blackdoc --check src/xncml docs
-	isort --check src/xncml tests
+lint/format-check: ## check style with ruff format
+	ruff format --check src/xncml tests
 
-lint: lint/flake8 lint/black ## check style
+lint: lint/flake8 lint/format-check ## check style
 
 test: ## run tests quickly with the default Python
 	python -m pytest

pyproject.toml

@@ -83,14 +83,6 @@ all = ["xncml[dev]", "xncml[docs]"]
 "Issue tracker" = "https://github.com/xarray-contrib/xncml/issues"
 "Changelog" = "https://github.com/xarray-contrib/xncml/blob/main/CHANGELOG.rst"
 
-[tool.black]
-target-version = [
-  "py39",
-  "py310",
-  "py311",
-  "py312"
-]
-
 [tool.bumpversion]
 current_version = "0.5.0"
 commit = true
@@ -172,10 +164,6 @@ exclude = [
   "docs/locales"
 ]
 
-[tool.isort]
-profile = "black"
-py_version = 38
-
 [tool.mypy]
 files = "."
 python_version = 3.9
@@ -215,6 +203,8 @@ exclude = [
 ]
 
 [tool.ruff.format]
+# Enable reformatting of code snippets in docstrings.
+docstring-code-format = true
 line-ending = "auto"
 
 [tool.ruff.lint]