root@dx-svn02:~# cat test.sh
#!/bin/bash
CMD="svn update /mnt/checkout/dx-test/"
echo "INFO>>>: $CMD"
$CMD

CMD="svn commit -m 'Updated various bits' /mnt/checkout/dx-test/"
echo "$CMD"
$CMD
root@dx-svn02:~# ./test.sh
INFO>>>: svn update /mnt/checkout/dx-test/
At revision 3.
svn commit -m 'Updated various bits' /mnt/checkout/dx-test/
svn: '/' is not a working copy
root@dx-svn02:~# svn commit -m 'Updated various bits' /mnt/checkout/dx-test/
root@dx-svn02:~#

ARGV[0] = svn
ARGV[1] = commit
ARGV[2] = -m
ARGV[3] = Updated various bits
...

ARGV[0] = svn
ARGV[1] = commit
ARGV[2] = -m
ARGV[3] = 'Updated
ARGV[4] = various
...