trac #16261: Default behaviour of AdditiveAbelianGroup(a_tuple)
trac #16261: Merged with 6.3.beta1
trac #16261: Broken doctests
Implemented a better search for highest weight elements in tensor products.
Created tensor product of crystals category.
Implemented other tensor product categories.
Cleanup of commented out code.
add a function to display xkcd comics
Use xkcd comic number from json data
Fixed category for abelian groups.
Implemented a general semigroup_generators() for monoids.
Moved monoid_generators to a method for finite_groups.
Merge branch 'public/groups/abelian_groups_category-15140' of trac.sagemath.org:sage into public/groups/abelian_groups_category-15140
Added multiplicative abelian groups to the catalog.
Merge branch 'develop' into public/groups/abelian_groups_category-15140
Merge branch 'u/ncohen/16261' of trac.sagemath.org:sage into public/groups/additive_abelian_groups-16261
Better IMO short_repr method and made some lines shorter/logically line broken.
Merge branch 'public/crystals/highest_weight_tensor-16451' of trac.sagemath.org:sage into public/crystals/highest_weight_tensor-16451
Made changes that Nicolas and I talked about.
Fix and test for Kashiwara convention of tensor products.