polymake: Implement PolymakeElement.__setitem__

[mkoeppe]

We implement the missing __setitem__ method for Perl ARRAYs.

CC: @simon-king-jena @jplab @dimpase @kliem

Component: interfaces: optional

Keywords: IMA Coding Sprints, days99

Author: Matthias Koeppe

Branch/Commit: u/mkoeppe/polymake__implement_polymakeelement___setitem__ @ 312c3c8

Issue created by migration from https://trac.sagemath.org/ticket/28265

[mkoeppe]

Branch: u/mkoeppe/polymake__implement_polymakeelement___setitem__

[mkoeppe]

New commits:

312c3c8

PolymakeElement.__setitem__: New

[mkoeppe]

Commit: 312c3c8

[embray]

comment:5

Ticket retargeted after milestone closed

[mkoeppe]

comment:6

Batch modifying tickets that will likely not be ready for 9.1, based on a review of the ticket title, branch/review status, and last modification date.

[mkoeppe]

comment:8

Setting new milestone based on a cursory review of ticket status, priority, and last modification date.

[mkoeppe]

comment:9

Setting a new milestone for this ticket based on a cursory review.