shell/ash_test/ash-parsing/process_subst.tests - busybox - Git at Google

 echo "TEST`echo zz;echo;echo`BEST"
 echo "TEST`echo '$(echo zz)'`BEST"
 echo "TEST`echo "'"`BEST"
	echo "TEST`echo zz;echo;echo`BEST"
	echo "TEST`echo '$(echo zz)'`BEST"
	echo "TEST`echo "'"`BEST"