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Commit f67776e7 authored by ram's avatar ram
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Some changes to make things work better in the face of display aborting

and buffer modification during display output (due to servicing events
in LISTEN.)  The main change was making the redisplay functions return
a meaningful value: T means did something, call again.  NIL means
did nothing (except possibly cursor positioning), can go into an input
wait.  :EDITOR-INPUT means redisplay aborted due to pending input.
Also, changed the *SCREEN-IMAGE-TRASHED* logic to not clear the flag
if dumb redisplay is aborted.
parent 11a66f31
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