3 files changed, 3 insertions, 3 deletions
diff --git a/sphinx/pycode/__init__.py b/sphinx/pycode/__init__.py
index 9ffb607db..c899410bd 100644
--- a/sphinx/pycode/__init__.py
+++ b/sphinx/pycode/__init__.py
@@ -77,7 +77,7 @@ class ModuleAnalyzer:
         return filename, None
 
     @classmethod
-    def for_string(cls, string: str, modname: str, srcname: str = '<string>'
+    def for_string(cls, string: str, modname: str, srcname: str = '<string>',
                    ) -> ModuleAnalyzer:
         return cls(string, modname, srcname)
 
diff --git a/sphinx/pycode/ast.py b/sphinx/pycode/ast.py
index 702006817..58c0fc056 100644
--- a/sphinx/pycode/ast.py
+++ b/sphinx/pycode/ast.py
@@ -35,7 +35,7 @@ def parse(code: str, mode: str = 'exec') -> ast.AST:
     """Parse the *code* using the built-in ast module."""
     warnings.warn(
         "'sphinx.pycode.ast.parse' is deprecated, use 'ast.parse' instead.",
-        RemovedInSphinx70Warning, stacklevel=2
+        RemovedInSphinx70Warning, stacklevel=2,
     )
     try:
         return ast.parse(code, mode=mode, type_comments=True)
diff --git a/sphinx/pycode/parser.py b/sphinx/pycode/parser.py
index 49ef4f7ff..cddb8bcf5 100644
--- a/sphinx/pycode/parser.py
+++ b/sphinx/pycode/parser.py
@@ -349,7 +349,7 @@ class VariableCommentPicker(ast.NodeVisitor):
         try:
             targets = get_assign_targets(node)
             varnames: list[str] = sum(
-                [get_lvar_names(t, self=self.get_self()) for t in targets], []
+                [get_lvar_names(t, self=self.get_self()) for t in targets], [],
             )
             current_line = self.get_line(node.lineno)
         except TypeError: