Answer prose round 1: plainer sentences in the two decisions, no provenance in items 108 and 109, and shorter comments in drawstate, render and format

format.go

@@ -124,8 +124,7 @@ func parseFormat(format string) ([]formatToken, error) {
 // draw state, the output emitted so far in the current expansion (for derivations
 // such as a checksum over preceding digits), and the values of the operands it named
 // (calc and the transforms name them). All must stay pure over (draw state, emitted, operands) so
-// seeded output is reproducible; seq advances per-generator counter state, which is
-// itself deterministic. arity is the exact arg count, or -1 for variadic (then
+// seeded output is reproducible. arity is the exact arg count, or -1 for variadic (then
 // checkArgs does all the validation).
 type builtin struct {
 	arity int