Python 3: minor fixes for simplicial_complex.py #25932
Description
This fixes a few of the Python 3-related doctest failures in simplicial_complex.py.
CC: @fchapoton @tscrim
Component: python3
Author: John Palmieri
Branch: dc6b7c9
Reviewer: Travis Scrimshaw
Issue created by migration from https://trac.sagemath.org/ticket/25932