Put Set in the category Sets()

[hivert]

Title says all.

Component: categories

Keywords: Category Sets

Author: Florent Hivert

Reviewer: John Palmieri

Merged: sage-4.5.2.alpha0

Issue created by migration from https://trac.sagemath.org/ticket/9256

[hivert]

comment:1

Attachment: trac_9256-set_in_category-fh.patch.gz

[jhpalmieri]

Reviewer: John Palmieri

[jhpalmieri]

comment:2

Looks good to me.

[hivert]

comment:3

Replying to @jhpalmieri:

Looks good to me.

Thanks for the review !

[qed777]

Merged: sage-4.5.2.alpha0