The sync aser-call in adapter-sx.sx didn't flatten list results from
map/filter in positional children — serialize(list) wrapped in parens
creating ((div ...) ...) which re-parses as an invalid call. Rewrote
aser-call from reduce to for-each (bootstrapper can't nest for-each
inside reduce lambdas) and added list flattening in both aser-call
and aser-fragment.
Also adds test-aser.sx (41 tests), render-sx platform function,
expanded test-render.sx (+7 map/filter children tests), and specs
async-eval-slot-inner in adapter-async.sx.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
giles
e843602ac9