Try to use ```with spaces```-tag with ```encode``` or without it.
In both cases the folder on disk will be named as ```with-spaces```.

Spaces (and other reserved symbols) will be always cut out.
I did explain it to you here: https://github.com/ludovicchabant/PieCrust/pull/77
* If ```dash``` NOT SET, only RESERVED SYMBOLS will be replaced with dashes.
* Otherwise, all non-latin symbols will be replaced.

That's how it works now.
And it doesn't matter whether ```encode``` is defined or not.