renamed old-style Drule.standard to Drule.export_without_context, to emphasize that this is in no way a standard operation;
#!/usr/bin/env bash
#
# Author: Makarius
#
# DESCRIPTION: invoke Scala within the Isabelle environment
[ -e "$ISABELLE_HOME/Admin/build" ] && { "$ISABELLE_HOME/Admin/build" jars || exit $?; }
CLASSPATH="$(jvmpath "$CLASSPATH")"
exec "$ISABELLE_SCALA" "$@"