Fails on Windows when the user folder name includes spaces

[the-overdriven]

My user folder is at C:\Users\John Doe.

Running gource throws an error:

fatal: ambiguous argument 'Doe\AppData\Local\Temp\\gource-a16780': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'
gource: failed to generate log file
Try 'gource --help' for more information.

and it creates an empty "John" file at C:\Users\John.

I'm on Windows 10.

[nicolasrsa]

Adding to this issue, Gource also fails when it includes accents.

The tested directory G:\Documents\Parágrafo

I'm also on Windows 10.