[3.12] gh-130618: Fix parser error when using lambdas inside f-strings (GH-130638) (#130644)

(cherry picked from commit e06bebb87e)

Lib/test/test_grammar.py

@@ -2030,6 +2030,18 @@ class GrammarTests(unittest.TestCase):
         with self.assertRaises(Done):
             foo().send(None)
 
+    def test_complex_lambda(self):
+        def test1(foo, bar):
+            return ""
+
+        def test2():
+            return f"{test1(
+                foo=lambda: '、、、、、、、、、、、、、、、、、',
+                bar=lambda: 'abcdefghijklmnopqrstuvwxyz 123456789 123456789',
+            )}"
+
+        self.assertEqual(test2(), "")
+
 
 if __name__ == '__main__':
     unittest.main()