Use "all +=" instead of duplicating the branches (#7865)

test_cases/stdlib/typing/all.py

@@ -0,0 +1,15 @@
+# pyright: reportWildcardImportFromLibrary=false
+
+"""
+This tests that star imports work when using "all += " syntax.
+"""
+
+import sys
+from typing import *  # noqa: F403
+from zipfile import *  # noqa: F403
+
+if sys.version_info >= (3, 9):
+    x: Annotated[int, 42]  # noqa: F405
+
+if sys.version_info >= (3, 8):
+    p: Path  # noqa: F405