fix incorrect type annotation
In my attempts at actually using this, I discovered that no, it actually
does take None.
@@ -2323,7 +2323,7 @@ class Interpreter(InterpreterBase, HoldableObject):
return self.install_data_impl(sources, kwargs['install_dir'], kwargs['install_mode'],
rename, kwargs['install_tag'], install_dir_name)
- def install_data_impl(self, sources: T.List[mesonlib.File], install_dir: str,
+ def install_data_impl(self, sources: T.List[mesonlib.File], install_dir: T.Optional[str],
install_mode: FileMode, rename: T.Optional[str],
tag: T.Optional[str],
install_dir_name: T.Optional[str] = None,
