Tom Christiansen's perlfunc cleansing, part 2

From "PATCH: perlfunc cleanup, part 2" (28574.1263366404@chthon)

Quite a lot here, I know.

I probably spent the most time on pack(), as you'll see, but there are
plenty of rephrasings of awkward wordings plus the occasional orthographic
fix scattered throughout.  I've added a few more examples here and there,
and certain simple things like perl vs Perl have been set to canonical form.

I've eyeballed the diffs for my own typos, and I've looked at the whole
thing after running it both through nroff (not so pretty, but better) and
also through troff (*much* better).

I didn't try to make sure all code inserts were indented the same number of
spaces, not because it doesn't need being done, but because I didn't want
to blow this patch up that much more than it already is.  You can see the
ragged left in the code inserts if you troff->ps->pdf view it.  Oh, well.

Hope this helps,

--tom