Use ruff formatter as pre-commit (#347)

* Use ruff formatter as pre-commit

* Format code and docstrings

* Format documentation

* Fix audb.info docstring

.pre-commit-config.yaml

@@ -13,9 +13,11 @@ default_language_version:
 
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.0.276
+    rev: v0.1.8
     hooks:
       - id: ruff
+        args: [ --fix ]
+      - id: ruff-format
   - repo: https://github.com/codespell-project/codespell
     rev: v2.2.4
     hooks:

CONTRIBUTING.rst

@@ -41,7 +41,7 @@ Coding Convention
 -----------------
 
 We follow the PEP8_ convention for Python code
-and check for correct syntax with ruff_.
+and use ruff_ as a linter and code formatter.
 In addition,
 we check for common spelling errors with codespell_.
 Both tools and possible exceptions
@@ -61,7 +61,8 @@ You can also install ruff_ and codespell_
 and call it directly::
 
     pip install ruff codespell  # consider system wide installation
-    ruff check .
+    ruff check --fix .  # lint all Python files, and fix any fixable errors
+    ruff format .  # format code of all Python files
     codespell
 
 It can be restricted to specific folders::

audb/__init__.py

@@ -27,6 +27,7 @@
 # Dynamically get the version of the installed module
 try:
     import importlib.metadata
+
     __version__ = importlib.metadata.version(__name__)
 except Exception:  # pragma: no cover
     importlib = None  # pragma: no cover