Fix ruff SIM101: merge isinstance calls

Author: calm329

mypy/types_utils.py

@@ -123,13 +123,8 @@ def is_generic_instance(tp: Type) -> bool:
 
 def is_overlapping_none(t: Type) -> bool:
     t = get_proper_type(t)
-    return (
-        isinstance(t, NoneType)
-        or isinstance(t, AnyType)
-        or (
-            isinstance(t, UnionType)
-            and any(isinstance(get_proper_type(e), NoneType) for e in t.items)
-        )
+    return isinstance(t, (NoneType, AnyType)) or (
+        isinstance(t, UnionType) and any(isinstance(get_proper_type(e), NoneType) for e in t.items)
     )
 
 

test-data/unit/check-unreachable-code.test

@@ -1653,12 +1653,7 @@ main:4: error: Statement is unreachable
 
 [case testNoFalseUnreachableWithAnyEqualityNarrowing]
 # flags: --warn-unreachable
-# Regression test for https://github.com/python/mypy/issues/20532
 from typing import Any, Optional
-
 def main(contents: Any, commit: Optional[str]) -> None:
-    if (
-        contents.get("commit") == commit
-        and (commit is not None or 1)
-    ):
+    if contents.get("commit") == commit and (commit is not None or 1):
         pass