So I have a file with many revisions and I'd like to find out when a certain line was changed and what it's previous value was. It's not in the past few revisions as I've checked. I don't really want to diff against ALL of the past revisions. It seems like there must be a way to do this, perhaps using two steps (one to find the file revision that the line was last changed in and another to do the actual svn diff).

Anyone know how to do this?