Restore stubtest 0.930 (#6663)

stdlib/inspect.pyi

@@ -53,6 +53,8 @@ CO_ITERABLE_COROUTINE: int
 CO_ASYNC_GENERATOR: int
 TPFLAGS_IS_ABSTRACT: int
 
+modulesbyfile: dict[str, Any]
+
 def getmembers(object: object, predicate: Callable[[Any], bool] | None = ...) -> list[tuple[str, Any]]: ...
 def getmodulename(path: str) -> str | None: ...
 def ismodule(object: object) -> TypeGuard[ModuleType]: ...