🩹Neo Angband: Bug Fixes v0.16.1

Fixed

• The Level generation section claimed the defect it repairs is 13 times more common than it is. The README, stairs.ts and plugin.ts all cited 10.2% of floors, 53 stranded in 520, measured when this repository was created. The engine has since measured the same thing over 15,000 levels and found 22, or 0.15%, all of them carrying the mechanism’s signature. The old figure was real and did not describe inherited behaviour: its non-vault majority was the port’s own streamer code bricking up secret doors, since fixed in the engine. A fresh sweep of 520 levels across depths 5 to 90 at engine 0.24.0 found 4 stranded, all four the up stair, which is consistent with the engine’s number.
• What the section does is unchanged, and so is the reason to have it: a stranded floor is unwinnable without a scroll or a tunnel. It is a rare wart rather than a common one, and the toggle a player is deciding about now says so.

Changed

• plugin.js is byte-identical to 0.16.0. All three corrections are comments or prose, and the build strips comments.