test: make T0 harness results complete

lib/regex/regex_test.ww

@@ -7,8 +7,8 @@
 // unexported internals (thread/newmatch, run_thread / add_thread /
 // delete_thread / search, find_last_groupstart / shift /
 // parse_repetition, is_consuming_inst) — lives in
-// lib/regex/regex_whitebox.ww (`package regex`, unified with regex.ww),
-// run via the lib/regex/wb/ driver.
+// lib/regex/regex_whitebox.ww (`package regex`, unified with regex.ww) and
+// runs as a separate root-package binary.
 //
 // Fold 2a ports compile()'s lit/any/match arms only; exec lives in
 // later folds, so the compile_* cases pin the emitted inst PROGRAM