Re: linum.el?

[Richard Stallman]

    I've found that even "modular" new features can be pretty annoying in
    merging to the trunk -- even if they start out the same on both the
    trunk and branch, many files seem to nevertheless generate a lot of
    merge conflicts.

Most of the time I don't think we should make the decision about
installing something in Emacs 22 just based on that.