RVR-on-by-default is the single most player-visible behavior wave 1
ships (rivers appear with no toggle hunt) and was only exercised by
live captures; gen_basins' default was pinned incidentally inside the
toggle-redraw spy test and gen_attractors not at all. One named test
now asserts all three fresh-construction defaults per Araminta's
ruling (RVR on, BAS off, ATR off). Revert-verified: flipping the
gen_rivers init line fails exactly this test by name (1 failure total
in the 78-test suite). Suite 78/78; gdlint clean.
Tickets: T-1156
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
jpmschweitzerandClaude Fable 5
c1cae7c9b5
