Switch formatter

.github/CONTRIBUTING.md

@@ -127,8 +127,10 @@ But it's way more comfortable to run it locally and *git* catching avoidable err
       :rtype: str
       """
   ```
+
 - If you add or change public APIs, tag the docstring using `..  versionadded:: 16.0.0 WHAT` or `..  versionchanged:: 16.2.0 WHAT`.
-- We use [*isort*](https://github.com/PyCQA/isort) to sort our imports, and we use [*Black*](https://github.com/psf/black) with line length of 79 characters to format our code.
+
+- We use [Ruff](https://ruff.rs/) to sort our imports and format our code with a line length of 79 characters.
   As long as you run our full [*tox*] suite before committing, or install our [*pre-commit*] hooks (ideally you'll do both – see [*Local Development Environment*](#local-development-environment) above), you won't have to spend any time on formatting your code at all.
   If you don't, [CI] will catch it for you – but that seems like a waste of your time!
 

.pre-commit-config.yaml

@@ -3,16 +3,12 @@ ci:
   autoupdate_schedule: monthly
 
 repos:
-  - repo: https://github.com/psf/black
-    rev: 24.10.0
-    hooks:
-      - id: black
-
   - repo: https://github.com/astral-sh/ruff-pre-commit
     rev: v0.7.2
     hooks:
       - id: ruff
         args: [--fix, --exit-non-zero-on-fix]
+      - id: ruff-format
 
   - repo: https://github.com/econchick/interrogate
     rev: 1.7.0

pyproject.toml

@@ -100,10 +100,6 @@ exclude_lines = [
 omit = ["src/prometheus_async/types.py"]
 
 
-[tool.black]
-line-length = 79
-
-
 [tool.interrogate]
 omit-covered-files = true
 verbose = 2
@@ -137,6 +133,7 @@ ignore_errors = true
 
 
 [tool.ruff]
+line-length = 79
 src = ["src", "tests", "docs/conf.py"]
 
 [tool.ruff.lint]
@@ -146,13 +143,14 @@ ignore = [
     "ANN",     # Mypy is better at this
     "ARG",     # unused arguments are common w/ interfaces
     "C901",    # sometimes you trade complexity for performance
-    "COM",     # Black takes care of our commas
+    "COM",     # formatter takes care of our commas
     "D",       # We prefer our own docstring style.
-    "E501",    # leave line-length enforcement to Black
+    "E501",    # leave line-length enforcement to formatter
     "EM101",   # simple strings are fine
     "FBT",     # bools are our friends
     "FIX",     # Yes, we want XXX as a marker.
     "INP001",  # sometimes we want Python files outside of packages
+    "ISC001",  # conflicts with formatter
     "N802",    # some names are non-pep8 due to stdlib logging / Twisted
     "N803",    # ditto
     "N806",    # ditto