Steve Holden, in <http://permalink.gmane.org/gmane.comp.python.general/658347>, about the RuntimeError you get when a Thread object is started twice: «"thread already started" implies that the thread is running, but you actually get the same message if you try to start any terminated thread (including a canceled one), so "threads cannot be restarted" might be a better message. Or, better still, "Threads can only be started once".» This patch fixes the wording as suggested.
Yes, the proposed wording is more suitable in the scenarios when the error is encountered. Also saw there is already a test (test_start_thread_again), which covers this. There is no harm in changing the wording.
