File: redo.doc

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\DOC redo

\TYPE {redo : (* history -> * history)}

\SYNOPSIS
Undoes an undo.

\LIBRARY window

\DESCRIBE

{redo h} restores to the present the state that was removed by the last
{undo} to the history.

\FAILURE
Fails if nothing has been undone, or if something else has been done
since the last {undo}.

\SEEALSO
set_max_hist, get_max_hist, present, epoch, dodo, undo

\ENDDOC