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--- Doc/library/signal.rst.2	2008-03-06 12:38:47.000000000 -0300
*************** The :mod:`signal` module defines one exc
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     Raised to signal an error from the underlying :func:`setitimer` or
     :func:`getitimer` implementation. Expect this error if an invalid
!    interval timer is passed to :func:`setitimer`.
     This error is a subtype of :exc:`IOError`.
  
  
--- 105,111 ----
  
     Raised to signal an error from the underlying :func:`setitimer` or
     :func:`getitimer` implementation. Expect this error if an invalid
!    interval timer or a negative time is passed to :func:`setitimer`. 
     This error is a subtype of :exc:`IOError`.