Use variable names instead of symbolic variables (part 2)

[jdemeyer]

Some more easy cases as part of #10483.

Depends on #23377

CC: @simon-king-jena @rwst

Component: basic arithmetic

Author: Simon King, Ralf Stephan

Branch/Commit: 40f62c0

Reviewer: Jeroen Demeyer, Ralf Stephan

Issue created by migration from https://trac.sagemath.org/ticket/23638

[jdemeyer]

Reviewer: Jeroen Demeyer

[jdemeyer]

Dependencies: #23377

[jdemeyer]

Branch: u/jdemeyer/ticket/23638

[jdemeyer]

Commit: 45b6e82

[jdemeyer]

comment:3

The first commit was moved from #10483. Please review my last commit.

---

New commits:

8108128	Clean up MPolynomialRing_generic.completion
92bafe2	Merge tag '8.1.beta2' into t/23377/clean_up_mpolynomialring_generic_completion
635b5f9	Trac #10483: deprecate the misuse of symbolic variables as polynomial variable
45b6e82	Minor fixes

[sagetrac-git]

Changed commit from 45b6e82 to 40f62c0

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. This was a forced push. New commits:

139abc8	Trac #10483: deprecate the misuse of symbolic variables as polynomial variable
40f62c0	Minor fixes

[rwst]

Changed reviewer from Jeroen Demeyer to Jeroen Demeyer, Ralf Stephan

[rwst]

comment:5

Is fine.