Add test case for recent types-regex regression (#9269)

stubs/regex/@tests/test_cases/check_finditer.py

@@ -0,0 +1,13 @@
+# pyright: reportUnnecessaryTypeIgnoreComment=true
+
+from __future__ import annotations
+
+from typing import List
+from typing_extensions import assert_type
+
+import regex
+
+# Regression tests for #9263
+assert_type(list(regex.finditer(r"foo", "foo")), List[regex.Match[str]])
+pat = regex.compile(rb"foo")
+assert_type(list(pat.finditer(b"foo")), List[regex.Match[bytes]])