Undocumented predicates

The following predicates are exported, but not or incorrectly documented.

 pair_all_with(Arg1, Arg2, Arg3)

 conj2list(Arg1, Arg2)

 tree_set_add(Arg1, Arg2, Arg3)

 maplist_dcg(Arg1, Arg2, Arg3, Arg4, Arg5, Arg6)

 sort_by_key(Arg1, Arg2, Arg3)

 member2(Arg1, Arg2, Arg3)

 variable_replacement(Arg1, Arg2, Arg3, Arg4)

 my_term_copy(Arg1, Arg2, Arg3)

 replicate(Arg1, Arg2, Arg3)

 tree_set_merge(Arg1, Arg2, Arg3)

 instrument_goal(Arg1, Arg2, Arg3, Arg4)

 init(Arg1, Arg2)

 copy_with_variable_replacement(Arg1, Arg2, Arg3)

 variable_replacement(Arg1, Arg2, Arg3)

 list2disj(Arg1, Arg2)

 time(Arg1, Arg2)

 list2conj(Arg1, Arg2)

 fold1(Arg1, Arg2, Arg3)

 tree_set_empty(Arg1)

 wrap_in_functor(Arg1, Arg2, Arg3)

 set_elems(Arg1, Arg2)

 atom_concat_list(Arg1, Arg2)

 identical_guarded_rules(Arg1, Arg2)

 disj2list(Arg1, Arg2)

 maplist_dcg(Arg1, Arg2, Arg3, Arg4, Arg5)

 tree_set_memberchk(Arg1, Arg2)

 arg1(Arg1, Arg2, Arg3)

 select2(Arg1, Arg2, Arg3, Arg4, Arg5, Arg6)

 fold(Arg1, Arg2, Arg3, Arg4)

 identical_rules(Arg1, Arg2)

 my_term_copy(Arg1, Arg2, Arg3, Arg4)