normalize_schema(): Extras are now always normalized to {} so before "int" => ["int", {}] and now => ["int", {}, {}]. (I think it's more proper, normalized form doesn't change when extras {} exist, and more clearly make the normalized form stand out visually).
bool: Add clause 'is_true' (I think it'll be more portable than using 'is').
array and hash no longer assume the Sortable role (actually it was a typo, it never was).
spectest: Add more tests (str, hash, bool, any, all).