partial revert

[Andreas Röhler]

Hi,

with several changes in a file, want to revert one of them but keep others.

Learned so far shelving the good and reverting the remain would be the 
path. The setback AFAIU: with shelve I must deal with all the changes.

OTOH as diff knows already every line, a command

revert-partial from-line to-line

seems within the range of possibilities.

Maybe it exists already?

Thanks,

Andreas