Remove an obsolete and bizarre comment
Flatten
Cleanup some get_monster_equipment_desc() code

Use comma_separated_line(), and remove an unreachable case.

(No idea what that block of code is intended to do - I can't get
it to fire...)
Cleanup get_monster_equipment_desc() a little more

More use of comma_separated_line().

Also, monsters with equipment but no weapons will now be listed
more nicely.

Here: Ijyb, wearing a ring mail

as opposed to the previous

Here: Ijyb wearing a ring mail