render method
Renders buffer content to a string.
Upstream: third_party/ultraviolet/buffer.go (Render).
Implementation
String render() {
final out = StringBuffer();
for (var i = 0; i < lines.length; i++) {
_renderLine(out, lines[i]);
if (i < lines.length - 1) out.write('\n');
}
return out.toString();
}