Fix super_predicates_that_define_assoc_type API doc
Fix super_predicates_that_define_assoc_type API doc

aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust