if test $# = 0; then    exec "$THIS_SH" var_subst_in_for.tests abc "d e"fiecho 'Testing: in x y z'for a in x y z; do echo ".$a."; doneecho 'Testing: in u $empty v'empty=''for a in u $empty v; do echo ".$a."; doneecho 'Testing: in u " $empty" v'empty=''for a in u " $empty" v; do echo ".$a."; doneecho 'Testing: in u $empty $empty$a v'a='a'for a in u $empty $empty$a v; do echo ".$a."; doneecho 'Testing: in $a_b'a_b='a b'for a in $a_b; do echo ".$a."; doneecho 'Testing: in $*'for a in $*; do echo ".$a."; doneecho 'Testing: in $@'for a in $@; do echo ".$a."; doneecho 'Testing: in -$*-'for a in -$*-; do echo ".$a."; doneecho 'Testing: in -$@-'for a in -$@-; do echo ".$a."; doneecho 'Testing: in $a_b -$a_b-'a_b='a b'for a in $a_b -$a_b-; do echo ".$a."; doneecho Finished