* blockinput.h (UNBLOCK_INPUT): We cannot assume that SIGIO is
defined everywhere this file is #included; merge the two definitions for defined (SIGIO) and ! defined (SIGIO) into one, which calls reinvoke_input_signal if interrupt_input_pending is set. * keyboard.c (reinvoke_input_signal): New function. * keyboard.c (syms_of_keyboard): Doc fix for extra-keyboard-modifiers.
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