Clarify that if txn->state != GHOST_TXN_READY then it could be claimed (on its way to being committed) or already committed.
Clarify that if txn->state != GHOST_TXN_READY then it could be claimed (on its way to being committed) or already committed.

google/ghost-userspace,google/ghost-userspace,google/ghost-userspace,google/ghost-userspace