sage.tensor.modules: make doctests involving SR optional

[egourgoulhon]

After #32415 and #32708, the code in the module sage.tensor.modules does no longer contain any dependency on symbolic parts of Sage. There remains however some doctests that invokes SR. They have been introduced to check a bug fix performed in #22520. In view of Sage modularization, they are marked # optional - sage.symbolic in this ticket.

Depends on #32708
Depends on #32614

CC: @mkoeppe @tscrim

Component: refactoring

Author: Eric Gourgoulhon

Branch/Commit: c3ff514

Reviewer: Matthias Koeppe

Issue created by migration from https://trac.sagemath.org/ticket/32712

[egourgoulhon]

Commit: f46cce7

[egourgoulhon]

Author: Eric Gourgoulhon

[egourgoulhon]

Branch: public/manifolds/remove_SR_doctests_in_tensor_modules-32712

[egourgoulhon]

New commits:

1635bd3	Remove import of Chart in sage.tensor.modules (#32708)
f46cce7	Remove SR doctests in sage.tensor.modules (#32712)

[mkoeppe]

comment:2

Instead of removing them, they could be marked as optional using #32614: See #32652 for an example

[egourgoulhon]

comment:3

Replying to @mkoeppe:

Instead of removing them, they could be marked as optional using #32614: See #32652 for an example

Very good. Should the tag be # optional - sage.symbolic.ring ?

[mkoeppe]

comment:4

see src/sage/features/sagemath.py (after merging #32614): just sage.symbolic

[mkoeppe]

Changed dependencies from #32708 to #32708, #32614

[egourgoulhon]

comment:5

Replying to @mkoeppe:

see src/sage/features/sagemath.py (after merging #32614): just sage.symbolic

OK, perfect.

[egourgoulhon]

Changed commit from f46cce7 to c3ff514