Is the "blank" inside the regex correct?

[mindeffects]

It's a very nice little helper you created there! Good job!

I was just wondering, if the "blank" inside the regex is correct?
/[^\.A-Za-z0-9 _-]/

The script still works fine because all blanks are getting removed/replaced. Still kinda strange, but hey. It work's!

[SnowCreative]

I'd really like the option to retain spaces rather than convert them to dashes or underlines.