regcreset regexp reset interpolation flag ck_fun s1 S
regcomp regexp compilation ck_null s| S
match pattern match ck_match d/
-qr pattern quote ck_match s0
+qr pattern quote ck_match s/
subst substitution ck_null dis/ S
substcont substitution cont ck_null dis|
trans character translation ck_null is" S