It would be a lot more useful, especially over at the FTB Gamepedia, if it would save the file names using the "pure" names instead of each space being replaced by underscores.
I'll add spaces to the whitelist. I mainly run Linux, and spaces are somewhat annoying to work with on the command line, so I generally consider them an "illegal" character when sanitizing filenames.
It would be a lot more useful, especially over at the FTB Gamepedia, if it would save the file names using the "pure" names instead of each space being replaced by underscores.