fix false positive with TypeVar defaults with more than one argument

pycodestyle.py

@@ -1066,12 +1066,6 @@ def whitespace_around_named_parameter_equals(logical_line, tokens):
         if token_type == tokenize.OP:
             if text in '([':
                 paren_stack.append(text)
-                # PEP 696 defaults always use spaced-style `=`
-                # type A[T = default] = ...
-                # def f[T = default](): ...
-                # class C[T = default](): ...
-                if in_generic and paren_stack == ['[']:
-                    annotated_func_arg = True
             elif text in ')]' and paren_stack:
                 paren_stack.pop()
             # def f(arg: tp = default): ...
@@ -1080,7 +1074,14 @@ def whitespace_around_named_parameter_equals(logical_line, tokens):
             elif len(paren_stack) == 1 and text == ',':
                 annotated_func_arg = False
             elif paren_stack and text == '=':
-                if annotated_func_arg and len(paren_stack) == 1:
+                if (
+                        # PEP 696 defaults always use spaced-style `=`
+                        # type A[T = default] = ...
+                        # def f[T = default](): ...
+                        # class C[T = default](): ...
+                        (in_generic and paren_stack == ['[']) or
+                        (annotated_func_arg and paren_stack == ['('])
+                ):
                     require_space = True
                     if start == prev_end:
                         yield (prev_end, missing_message)

testing/data/python313.py

@@ -10,6 +10,10 @@ class C2[T = str]:
     pass
 
 
+class C3[T, U: str = str]:
+    pass
+
+
 def f[T: (int, str) = str](t: T) -> T:
     pass