Fix flake8 errors

Author: TLouf

sphinx/domains/c.py

@@ -3272,7 +3272,9 @@ def handle_signature(self, sig: str, signode: TextElement) -> ASTDeclaration:
             and len(sig) > max_len
         )
         signode['is_multiline'] = multiline
-        parser = DefinitionParser(sig, location=signode, config=self.env.config, multiline=multiline)
+        parser = DefinitionParser(
+            sig, location=signode, config=self.env.config, multiline=multiline
+        )
         try:
             ast = self.parse_definition(parser)
             parser.assert_end()

sphinx/domains/cpp.py

@@ -7363,7 +7363,9 @@ def handle_signature(self, sig: str, signode: desc_signature) -> ASTDeclaration:
             and len(sig) > max_len
         )
         signode['is_multiline'] = multiline
-        parser = DefinitionParser(sig, location=signode, config=self.env.config, multiline=multiline)
+        parser = DefinitionParser(
+            sig, location=signode, config=self.env.config, multiline=multiline
+        )
         try:
             ast = self.parse_definition(parser)
             parser.assert_end()