$ dirs=$(ls -1d /mnt/*/)
$ echo $dirs
/mnt/ext4/ /mnt/local/ /mnt/remote/ /mnt/test/
$ echo "$dirs"
/mnt/ext4/
/mnt/local/
/mnt/remote/
/mnt/test/

#!/bin/sh

dirs=$(ls -1d $1)
echo "inline"
echo $dirs
echo "multiline"
echo "$dirs"

$ ./test.sh /mnt/*/
inline
/mnt/ext4/
multiline
/mnt/ext4/