error: expected DOCTYPE keyword
 --> tests/ui/doctype.rs:4:11
  |
4 |         <!not_doctype html>
  |           ^^^^^^^^^^^

error: Node parse failed
 --> tests/ui/doctype.rs:4:23
  |
4 |         <!not_doctype html>
  |                       ^^^^

error: Tokens was skipped after incorrect parsing
 --> tests/ui/doctype.rs:4:23
  |
4 |         <!not_doctype html>
  |                       ^^^^^