error: expected name `foo` in `endblock` tag, found `not_foo`
       problems parsing template source at row 1, column 27 near:
       "not_foo %}"
 --> tests/ui/name_mismatch_endblock.rs:3:10
  |
3 | #[derive(Template)]
  |          ^^^^^^^^
  |
  = note: this error originates in the derive macro `Template` (in Nightly builds, run with -Z macro-backtrace for more info)