gh-35045: Convert result of multivariate polynomial evaluation into correct parent
Importing trac/u/roed/incorrect_parent_when_evaluating_constant_multivar
iate_polynomial...
(meant to fix #33373)
URL: https://github.com/sagemath/sage/pull/35045
Reported by: Marc Mezzarobba
Reviewer(s): Marc Mezzarobba, Travis Scrimshaw