lib/Tools/scalac

clarified message;

#!/usr/bin/env bash
#
# Author: Makarius
#
# DESCRIPTION: invoke Scala compiler within the Isabelle environment

isabelle_admin_build jars || exit $?

isabelle_scala scalac -Dfile.encoding=UTF-8 \
  "-Djava.ext.dirs=$(platform_path "$ISABELLE_JDK_HOME/jre/lib/ext")" \
  -classpath "$(platform_path "$ISABELLE_CLASSPATH")" "$@"