parse method
Implementation
@override
Node parse(BlockParser parser) {
var childLines = parseChildLines(parser);
// The Markdown tests expect a trailing newline.
childLines.add('');
var content = childLines.join('\n');
if (parser.document.encodeHtml) {
content = escapeHtml(content);
}
return Element('pre', [Element.text('code', content)]);
}