Undo command?

[Nicholas Allen]

Hi,

I think it makes sense to have an undo command that can revert the 
changes made in given revision (or revision range) for a file or the 
entire branch. I know this is possible with the merge command but that 
is not very intuitive or obvious and I don't think it can work on 
individual files but only the whole branch. I guess you could also do it 
with the diff command and then pipe that through the patch command but 
that is also a little cumbersome. It seems that this is a reasonably 
high level operation but it has no simple command to implement it. 
Wouldn't it make sense to have a command to do this?

Nick