error[E0308]: mismatched types
 --> tests/ui/fail_non_string_argument.rs:3:10
  |
3 | no_spec!(42);
  |          ^^ expected `&str`, found integer

error[E0308]: mismatched types
 --> tests/ui/fail_non_string_argument.rs:3:10
  |
3 | no_spec!(42);
  | ---------^^-
  | |        |
  | |        expected `&str`, found integer
  | arguments to this function are incorrect
  |
note: function defined here
 --> src/lib.rs
  |
  | pub const fn has_non_whitespace(value: &str) -> bool {
  |              ^^^^^^^^^^^^^^^^^^