After running cvs-status, I see a file that says "Need update". I've
got r1.15, while the current is r1.16. I'd like to see what has been
changed in the file. There doesn't seem to be any way to do this
under pcl-cvs-2.9.9. Selecting either diff "=" or interactive diff
"de" doesn't work. Instead, it seems to be diffing between my current
1.15 and the repository 1.15, which shows no differences. I want to
diff against the head. This must be a commonly desired item.
I know I can switch to vc and do diff between revisions, but it would
be nice to not have to switch tools.