Leave blank lines in yaml untouched

[WhiteNoise]

API: processFrontMatter removes string quotes, comments, types, formatting

So we’ve had long debates about this, and it mostly comes down to a trade-off between allowing user to store arbitrary comments and formatting in the YAML, vs making it not painful for plugins to interact with YAML. I will say that it is rather unfortunate that YAML became the most popular way markdown documents store metadata. YAML is difficult to write by hand because it provides way too many options to write the same thing, and there’s a lot of “gotchas” such as reserved keywords, the many m…