> Maybe other users have a different experience, but for me 99% of the
> time I would like undo info after a revert is when revert was invoked
> by VC/pcl-cvs after a commit.
> So from this users point of view if VC/pcl-cvs were not to revert the
> buffer, saving undo after revert would not be missed much. 

Indeed, it may also be useful to allow the revert-undoability to be
specified on a revert-by-revert basis.  And VC/PCL-CVS would be well served
by a "revert carefully" which would do something like "diff+patch" rather
than an actual revert.  Note that revert already does a limited form of
diff+patch since it checks the prefix&suffix of the file/buffer which hasn't
changed, so if only one line was changed the undo would record only
a one-line change rather than a complete delete+insert of the whole buffer.


        Stefan


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