They can come with all sorts of interesting characters, even non-printing ones which makes the output of ls interesting. What I mean is, you don't normally create files with spaces when footling around in the shell so it is less likely that you will have a /path/to/script with spaces. You often get paths with spaces on partitions that have been Samba shared to MS Windows boxes, "New Folder" being prevalent :-(

Cheers,

JohnGG