s:contains-char? to s:contains/char?
s:contains-string? to s:contains/string?
a:contains-string? to a:contains/string?
old names are now deprecated and will be removed after 2021.7.
FossilOrigin-Name: 5a19d7aac514c5ba87963c5f0645f3daa8a8e3dc04546c0627fa046479ecd8dd