another undo patch: a feature request and implementation, should it be of interest

[Joel K. Pettersson]

> This patch does not change the usage notice nor documentation, so this
> remains to do. (and perhaps stylistic or other changes if the code is
> not up to your standards or I messed up somewhere)

I did mess something up, namely parameter handling of new option in
main() - the kludge around getopt was incomplete, and so, while the
use examples in the previous mail would work, reordering them like
this wouldn't:

undo -d -3 -2

Instead, that became equivalent to:

undo -d -32

This fixed in new patch.

-- 
 -  Joel K. Pettersson
Attachment:
undo.patch
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