Uses wrap = none for HTML output

[eliocamp]

This Closes #1430

[cderv]

it seems this broke some tests - we may need to adapt some processing to this change, especially if what is broken has been added after the --wrap=preserve addition.

Can you have a look to see why the specific test fails ? Otherwise I'll do it soon

[eliocamp]

Tests pass on my computer (Pandoc version 2.19.2). Oh boy, this will be fun to debug...

[eliocamp]

Ok, partial improvement. I changed it to use wrap=preserve for gitbook, but only because that's the format that's testing #504, apparently. So this doesn't really fix the issue, it just seems to hide it. gitbook will still have #1430 unfixed and #504 might be broken in other formats, if I understand things correctly.

Pandoc <= 2.16.2 fails a lot, though. No idea why.

[CLAassistant]

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