Markup fix; explain what interval timers do; typo fix
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@ -82,7 +82,7 @@ The variables defined in the :mod:`signal` module are:
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.. data:: ITIMER_REAL
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Decrements interval timer in real time, and delivers SIGALRM upon expiration.
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Decrements interval timer in real time, and delivers :const:`SIGALRM` upon expiration.
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.. data:: ITIMER_VIRTUAL
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@ -149,6 +149,12 @@ The :mod:`signal` module defines the following functions:
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:func:`alarm`) and after that every *interval* seconds. The interval
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timer specified by *which* can be cleared by setting seconds to zero.
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When an interval timer fires, a signal is sent to the process.
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The signal sent is dependent on the timer being used;
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:const:`signal.ITIMER_REAL` will deliver :const:`SIGALRM`,
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:const:`signal.ITIMER_VIRTUAL` sends :const:`SIGVTALRM`,
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and :const:`signal.ITIMER_PROF` will deliver :const:`SIGPROF`.
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The old values are returned as a tuple: (delay, interval).
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Attempting to pass an invalid interval timer will cause a
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@ -159,7 +165,7 @@ The :mod:`signal` module defines the following functions:
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.. function:: getitimer(which)
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Returns current value of a given interval timer especified by *which*.
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Returns current value of a given interval timer specified by *which*.
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.. versionadded:: 2.6
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