I would like to ask if anyone knows of a Unix program that is like patch(1), but applies each diff interactively so I can decide on whether to apply a particular diff.

This is my situation: someone has made certain changes to a file I created, sent me the modified copy and I would like the program to prompt me interactively for each change so that I can decide on whether to apply each and every change to my original copy.

Any ideas is very much appreciated.