Abstract pexpect.SpawnBase has no send/sendline/write/writelines stubs

The actual implementation of pexpect.SpawnBase does not contain these functions but it is an abstract class and all children have these write methods.

Since almost all interesting pexpect code does some form of writing it is impractical to use SpawnBase as an annotation. The only viable solution seem to be annotating with PopenSpawn or maybe an union if you actually want to be generic?

Perhaps it would be acceptable to add these stubs to SpawnBase despite what is written in the implementation.

Localisez le stub SpawnBase dans typeshed et comparez-le aux stubs enfants qui définissent send, sendline, write et writelines. Vérifiez les tests de typing pertinents ou exécutez les tests de vérification de types du dépôt afin de confirmer que les annotations de SpawnBase exposent ces méthodes sans interrompre les implémentations existantes.