Thanks for the awesome package, I'm able to implement markdown support for prettier using remark-parse (prettier/prettier#2943).

While I was implementing the pretty printer, I found there are some cases that parsed incorrectly according to the CommonMark spec 0.25:

(The commonmark option is linked to Commonmark Spec 0.25, so I guess it's based on 0.25?)

• _\__ (remark)
• commonmark spec example 160 (remark)
• commonmark spec example 239 (remark)
• commonmark spec example 270 (remark)
• commonmark spec example 275 (remark)
• commonmark spec example 323 (remark)
• commonmark spec example 389 (remark)
• commonmark spec example 416 (remark)