#   This program is free software: you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
set -- ' abc' 'def ghi' 'jkl '

echo normal IFS
recho $@
: ${var=$@}
recho $var
unset -v var
recho ${var-$@}

echo null IFS
IFS=
recho $@
: ${var=$@}
recho $var
unset -v var
recho ${var-$@}

echo non-standard IFS
IFS=:
recho $@
: ${var=$@}
recho $var
unset -v var
recho ${var-$@}	# this is inconsistent

echo unset IFS
recho $@
: ${var=$@}
recho $var
unset -v var
recho ${var-$@}