error: unexpected end of macro; missing "<", code block or literal
  --> $DIR/unexpected-end-of-macro.rs:9:30
   |
9  |       let _: DOMTree<String> = html!{
   |  ______________________________^
10 | |         <title>
11 | |     };
   | |_____^
   |
   = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)

error: aborting due to previous error