concurrent.futures.Future.add_done_callback: calling thread description error.

asyncio.run_coroutine_threadsafe will return a concurrent.futures.Future.
And according to its doc concurrent.futures.Future.add_done_callback() :

Added callables are called in the order that they were added and are always ** called in a thread belonging to the process that added them. **

But acually, the callback is called in where Future.set_result() is called according to its source.

Linked PRs

• gh-122678

Comienza con la documentación de concurrent.futures.Future.add_done_callback() y el comportamiento al que se llega mediante asyncio.run_coroutine_threadsafe; compara la redacción con la ruta del código fuente de Future.set_result(). Se considera terminado cuando la documentación describe correctamente el hilo en el que se ejecutan los callbacks, teniendo en cuenta el PR vinculado existente antes de realizar cambios.