[gboone42]

I can't find a specific example off the top of my head but I'll say I've been managing a Jekyll site for a while now and whitespace errors in frontmatter and data files cause all kinds of problems. I'm not sure I could explain the details but it's a legit criticism of YAML. IMO part of the problem is that YAML looks very straightfowrard and is until it suddenly isn't. Whitespace is part of that problem.

[kaishiro]

As an anecdote on the flip side, I've been building Middleman sites for a while now and can't remember ever having an issue with whitespace in the front matter or local data.