We have a style guide? ;-)

The format should be made clear in the easyconfig format 2.0 documentation wiki page, to be created.

I really feel we should allow spaces here, since it greatly improves readability, and making it clear we want spaces in the pyheader (PEP8 style), but disallow them in the sections is going to be hard to explain. ;-)
Unless it proves to be a blocking issue because it complicates things too much, I'd allow/encourage the use of spaces.