Note: The differences for the comparison of the comparison between ogs5 and ogs6 arose from an abs(..) which I added compared to Marc's approach. If I do the same for the calculation, there is no difference.

use pandoc, not md, because of formula rendering.

Also some trailing whitespaces.

Lars Bilke authored 6 years ago and Dmitri Naumov committed 6 years ago

Fixes formula rendering errors. Pandoc is also a superset of Markdown
with lots of useful features. For the future we should use just Pandoc
as format.