Changes

Changes from Mercurial (hg https://bitbucket.org/isa-afp/afp-devel/ default)

Changeset 10412:ec0a9bfaf811 by rene thiemann _rene.thiemann@uibk.ac.at_: added simple lemma on sumlist
The file was modified	`thys/Jordan_Normal_Form/VS_Connect.thy`