error: expected one of `(`, `[`, or `{`, found `thing`
  --> $DIR/misspelled-macro-rules.rs:7:14
   |
LL | marco_rules! thing {
   | -----------  ^^^^^ expected one of `(`, `[`, or `{`
   | |
   | help: perhaps you meant to define a macro: `macro_rules`

error: aborting due to previous error