Re: how about a find-library-other-window command?

[Richard Stallman]

    Now, if switch-to-buffer looked at the keys used to invoke the current
    command, it could DTRT if command invoked with a C-x 4 or C-x 5 prefix
    vs. a plain C-x prefix.

That would work, but it doesn't seem very clean.

If we want to have the same command do both jobs (same window and
other window), I'd rather have `interactive' set up an argument to
tell it which one to do.

However, I think it is cleaner to continue to have different commands
for the same-window and other-window cases.

In other words, I think the cleanest approach for this is the one
we are now using, and that it is best not to change this at all.