At the moment, subs of a (multivariate) laurent polynomial implements its own subs, whereas polynomials, etc. use the more efficient __call__ for doing so.

Component: algebra

Author: Clemens Heuberger, Daniel Krenn

Branch/Commit: 5497d90

Reviewer: Clemens Heuberger, Daniel Krenn

Issue created by migration from https://trac.sagemath.org/ticket/22064