I'm not sure what happens in all cases if data is str, so be extra careful

Author: adamtheturtle

stubs/docutils/docutils/io.pyi

@@ -105,7 +105,7 @@ class FileOutput(Output):
     ) -> None: ...
     def open(self) -> None: ...
     @overload
-    def write(self, data: str) -> str: ...
+    def write(self, data: str) -> str | bytes: ...
 
     @overload
     def write(self, data: bytes) -> bytes: ...