look_at tweak

look_at tweak

When examining a trap with '/' or ';', show
 |a trap (arrow trap)
instead of
 |a trap or a vibrating square (arrow trap)
outside of Gehennom (unless the trap actually is a vibrating square,
which could happen via wizard mode wish).  The extra verbosity is
distracting, and limiting mention of the vibrating square to the region
where it's relevant may give a hint to players getting that far for the
first time.