fn parse_xml(src: &str) -> Result<El, String>Expand description
Minimal well-formed-ish XML reader: elements, attributes, text, CDATA; comments / PIs / DOCTYPE are
skipped. Mismatched or missing close tags unwind instead of failing — exported timelines are machine
written, but a truncated one should still give back what it has. Nesting is capped at
MAX_XML_DEPTH.