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exit 

        # Thread.exit

(from ruby core)
---
    Thread.exit   -> thread

---

Terminates the currently running thread and schedules another thread to
be run.

If this thread is already marked to be killed, ::exit returns the
Thread.

If this is the main thread, or the last  thread, exit the process.


(from ruby core)
---
    exit()

---

Terminates `thr` and schedules another thread to be run, returning the
terminated Thread.  If this is the main thread, or the last thread,
exits the process.


(This method is an alias for Thread#kill.)

Terminates `thr` and schedules another thread to be run, returning the
terminated Thread.  If this is the main thread, or the last thread,
exits the process.

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