[entity] do not raise an AssertionError if the kwargs given to set_relations/attributes is empty
Regression was introduced in 3.16 with the new cw_set API.
Old set_relations and set_attributes methods did not crash on empty
kwargs.
Closes #3104019.
#! /bin/sh -e
#
if [ "$1" = configure ]; then
if which install-docs >/dev/null 2>&1; then
install-docs -i /usr/share/doc-base/cubicweb-doc
fi
fi
#DEBHELPER#
exit 0