Tracks fenced code blocks per CommonMark: opener {0,3}({3,}|~{3,})`, a backtick opener's info string may not contain a backtick, and a closer is the same character at least as long with nothing else on the line.
{0,3}(
Feed one line; returns true when the line is inside (or delimits) a fence.
Tracks fenced code blocks per CommonMark: opener
{0,3}({3,}|~{3,})`, a backtick opener's info string may not contain a backtick, and a closer is the same character at least as long with nothing else on the line.