Fix @seealso for make_()

[szhorvat]

The "see also" section for make_() does not have links.

It should list all functions from the constructor modifier family (without making make_() itself a part of this family). I'm not sure if there's a simple way to do this (other than manual listing). Can you help, @maelle ?

The same should also be listed as "see also" for sample_().