[multi-source] add test case for an encountered bug, fixed by adding state_of to dont_cross_relations. Added a note to remind me that something should be done to be smarter in handling this

#! /bin/sh -e
#

if [ "$1" = remove -o "$1" = upgrade ]; then
  if which install-docs >/dev/null 2>&1; then
    install-docs -r cubicweb-doc
  fi
fi

#DEBHELPER#

exit 0