"Set horizontal margins" commit missing comma

[sogaiu]

Thanks for your helpful tutorial (both blog post versions).

I'm still working my way through, but noticed in the "Set horizontal margins" commit that there seems to be a comma missing:

rightmargindistance=1mm

...though I have not yet been able to tell from the generated .pdf output (^^;

(Perhaps you know this already as a comma gets added in the next commit, but FWIW.)