blockquoteLine method
Implementation
Parser<String> blockquoteLine() =>
seq3(ref0(nonIndentSpace), char('>'), char(' ').optional())
.then(
noneOf('\r\n').starString().then(
[ref0(newlineSequence), endOfInput()].toChoiceParser().flatten(),
),
)
.map((res) => '${res.$2.$1}${res.$2.$2}');