"Your pair of speed boots glow silver for a moment." should be
"Your pair of speed boots glows silver for a moment.". The fix
reverses a post-3.6.0 change to is_plural(). Also, add new
pair_of() to test for object formatted as "pair of Bars". For verb
usage, that's definitely singular, but for pronoun usage, sometimes
plural seems better (although it might actually be incorrect).
I fixed up the formatting of a block comment in obj.h, but it is
still a candidate for tab cleanup.
6632c380f3