Apply lint fixes

Author: mxamin

doc/source/conf.py

@@ -19,12 +19,12 @@
 source_suffix = '.rst'
 master_doc = 'index'
 
-project = u'python-xmlsec'
-copyright = u'2020, Oleg Hoefling <[email protected]>'  # noqa: A001
-author = u'Bulat Gaifullin <[email protected]>'
+project = 'python-xmlsec'
+copyright = '2020, Oleg Hoefling <[email protected]>'
+author = 'Bulat Gaifullin <[email protected]>'
 release = importlib.metadata.version('xmlsec')
 parsed: Version = parse(release)
-version = '{}.{}'.format(parsed.major, parsed.minor)
+version = f'{parsed.major}.{parsed.minor}'
 
 exclude_patterns: list[str] = []
 pygments_style = 'sphinx'
@@ -39,19 +39,19 @@
     (
         master_doc,
         'python-xmlsec.tex',
-        u'python-xmlsec Documentation',
-        u'Bulat Gaifullin \\textless{}[email protected]\\textgreater{}',
+        'python-xmlsec Documentation',
+        'Bulat Gaifullin \\textless{}[email protected]\\textgreater{}',
         'manual',
     )
 ]
 
-man_pages = [(master_doc, 'python-xmlsec', u'python-xmlsec Documentation', [author], 1)]
+man_pages = [(master_doc, 'python-xmlsec', 'python-xmlsec Documentation', [author], 1)]
 
 texinfo_documents = [
     (
         master_doc,
         'python-xmlsec',
-        u'python-xmlsec Documentation',
+        'python-xmlsec Documentation',
         author,
         'python-xmlsec',
         'One line description of project.',
@@ -75,8 +75,7 @@
 
 
 def lxml_element_doc_reference(app: Sphinx, env: BuildEnvironment, node: pending_xref, contnode: Text) -> reference:
-    """
-    Handle a missing reference only if it is a ``lxml.etree._Element`` ref.
+    """Handle a missing reference only if it is a ``lxml.etree._Element`` ref.
 
     We handle only :class:`lxml.etree._Element` and :class:`~lxml.etree._Element` nodes.
     """
@@ -85,7 +84,7 @@ def lxml_element_doc_reference(app: Sphinx, env: BuildEnvironment, node: pending
         and node.get('reftarget', None) == 'lxml.etree._Element'
         and contnode.astext() in ('lxml.etree._Element', '_Element')
     ):
-        reftitle = '(in lxml v{})'.format(lxml.__version__)  # type: ignore[attr-defined]
+        reftitle = f'(in lxml v{lxml.__version__})'  # type: ignore[attr-defined]
         newnode = reference('', '', internal=False, refuri=lxml_element_cls_doc_uri, reftitle=reftitle)
         newnode.append(contnode)
         return newnode

pyproject.toml

@@ -29,17 +29,6 @@ line-length = 130
 # Target Python version (used for autofixes and style rules)
 target-version = "py39"
 
-# Enable rule categories:
-# E = pycodestyle (style issues, like indentation, whitespace, etc.)
-# F = pyflakes (unused imports, undefined names)
-# D = pydocstyle (docstring format/style issues)
-# I = isort (import sorting)
-# B = flake8-bugbear (common bugs & anti-patterns)
-# UP = pyupgrade (auto-upgrade syntax for newer Python)
-# SIM = flake8-simplify (simplifiable code patterns)
-# RUF = Ruff-native rules (extra, performance-optimized checks)
-select = ["E", "F", "D", "I", "B", "UP", "SIM", "RUF"]
-
 # Directories and files to exclude from linting and formatting
 exclude = [
   ".venv*",         # virtual environments
@@ -52,8 +41,20 @@ exclude = [
   "*_pb2.pyi"       # protobuf-generated type stubs
 ]
 
-# File-specific rule ignores (equivalent to flake8's `per-file-ignores`)
-[tool.ruff.per-file-ignores]
+[tool.ruff.lint]
+# Enable rule categories:
+# E = pycodestyle (style issues, like indentation, whitespace, etc.)
+# F = pyflakes (unused imports, undefined names)
+# I = isort (import sorting)
+# B = flake8-bugbear (common bugs & anti-patterns)
+# UP = pyupgrade (auto-upgrade syntax for newer Python)
+# SIM = flake8-simplify (simplifiable code patterns)
+# RUF = Ruff-native rules (extra, performance-optimized checks)
+select = ["E", "F", "I", "B", "UP", "SIM", "RUF"]
+# TODO: Add more rule categories as needed, e.g.:
+# D = pydocstyle (docstring format/style issues)
+
+[tool.ruff.lint.per-file-ignores]
 "*.pyi" = [
   # Ignore formatting and import errors in stub files
   "E301", # expected 1 blank line, found 0
@@ -62,6 +63,7 @@ exclude = [
   "E501", # line too long
   "E701", # multiple statements on one line
   "F401", # unused import
+  "F811", # redefinition of unused name
   "F822"  # undefined name in `__all__`
 ]
 "doc/source/conf.py" = [