Do allow abilities without an HP cost to be used under ddoor.

Broken by 109c0d6, which inadvertently disallowed all abilities from
being used while under ddoor.
Fix typo
Refactor ASSERT(a && b) again

This commit converts ASSERT(a && b) to ASSERT(a); ASSERT(b);
Assertions of the form !(a && b) are left intact, since there isn't an
obvious readability gain over (!a || !b).
Make statue-form vampires poison-immune.

Wishful indentation doesn't change the fact that || has higher
precedence than ?:

This would theoretically also affect vampires with divine stamina, if
Zin weren't such a racist.
Don't allow Fo to get acute vision.

They have SInv from antennae 3 and so the mutation is pointless.
Fix a typo in exoskeleton mutation message.
Fix setting {Regen} randart property in wizmode

This was changed from bool (add 40 to rate or not) to a number in
180ebbfc23cde438bae5f78af1c326cab8ce24a5.
Not changing the property type (from bool) however meant this number
was either 0 or 1 up until now, which is rather different from 40.

Why does this property never generate "in the wild" by the way?
Fix missing Hell, Abyss and Pan entries as well.
Update a comment for new topology.
Refactor pairs of asserts to ASSERT_RANGE.

More readable, and failures give more informative messages.
Drop a pointless variable.
Make Depths exit a regular branch stair.

This might be a bit debatable, but to me having a portal both ways suggests
you're magically transported somewhere.  A mundane stair protected by a gate
would have a gate on one side and a regular stairway on the other -- a pair
of gates is possible but would be unnecessary expense on part of the
dungeon's builders.
Fixed "FTILE: " displayed incorrectly after reload (#7748)
Remove colons in wizmode command overview

Should now fit on 80x24 again, with the exception of `|`.
Improve &^[TU] description (ChrisOelmueller)
Shorten the last &? straggler.
Don't pick abyss mobs from Dwarf

Dwarf isn't a valid branch, so veto it for abyss monster selection.
Fix saves where Dwarf has gotten baked into the abyss branch.
Raiju: Lightning Beasts

An abyssal lightning beast. Transforms itself into a light and blinks.
Unbreak all beams
Raiju descriptions