Make sage.misc.superseded independent of sage.rings.integer_ring

[nthiery]

This ticket removes the dependency of sage.misc.superseded upon
sage.rings.integer_ring.is_IntegerRing which was used for type
checking. This allows for using the functions in this module in code
that is imported early upon Sage startup, in particular in category
code.

By the way, this removes an unneeded test (the ticket number cannot be None).

Component: misc

Author: Nicolas M. Thiéry

Branch/Commit: u/jdemeyer/ticket/15757 @ 8656817

Reviewer: Nathann Cohen, Jeroen Demeyer

Issue created by migration from https://trac.sagemath.org/ticket/15757

[nthiery]

Branch: u/nthiery/ticket/15757

[nthiery]

Description changed:

--- 
+++ 
@@ -1,4 +1,4 @@
-This ticket makes sage.misc.superseded less dependent on
+This ticket makes sage.misc.superseded lazily import
 sage.rings.integer_ring.is_IntegerRing for type checking. This allows
 for using the functions in this module in code that is imported early
 upon Sage startup, in particular in category code.

[nthiery]

Author: Nicolas M. Thiéry

[nthiery]

New commits:

db4e280

15757: make sage.misc.superseded import lazily sage.rings.integer_ring

[nthiery]

Commit: db4e280

[nthiery]

Description changed:

--- 
+++ 
@@ -2,3 +2,5 @@
 sage.rings.integer_ring.is_IntegerRing for type checking. This allows
 for using the functions in this module in code that is imported early
 upon Sage startup, in particular in category code.
+
+By the way, this removes an unneeded test (the ticket number cannot be None).

[nathanncohen]

Reviewer: Nathann Cohen

[nathanncohen]

comment:5

Yo !

Looks good, no problem. All tests in combinat/ pass on my computer, and the patchbot will check the rest. This being said, you wrote your patch on top of 5.13.rc0 and we are on 6.1.rc0 at the moment ! Are you using 'develop' (and not 'master') ? This caused no conflict here.

Nathann