If the player gives the 'T' command while not wearing any armor,
don't suggest "use 'R' to remove accessories" unless the character is
actually wearing accessories. Likewise for 'R' while not wearing any
accessories, don't suggest "use 'T' to take off armor" unless wearing
some.
Add missing amulet case to the silly_thing() handling for 'W' and
'T'. Also handle boots, gloves, and lenses as plural in the message
there. silly_thing() has been simplified a little bit in the process.
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