warning: the `main` function of this doctest won't be run as it contains expressions at the top level, meaning that the whole doctest code will be wrapped in a function
  --> $DIR/warn-main-not-called.rs:10:1
   |
10 | //! ```
   | ^^^^^^^

warning: the `main` function of this doctest won't be run as it contains expressions at the top level, meaning that the whole doctest code will be wrapped in a function
  --> $DIR/warn-main-not-called.rs:19:1
   |
19 | //! ```
   | ^^^^^^^

warning: 2 warnings emitted