E0559 needs to be updated to new format

[sophiajt]

From: src/test/compile-fail/E0559.rs

E0559 needs a help converted to a span_label, updating this:

error[E0559]: struct variant `Field::Fool` has no field named `joke`
  --> src/test/compile-fail/E0559.rs:16:27
   |
16 |     let s = Field::Fool { joke: 0 }; //~ ERROR E0559
   |                           ^^^^
   |
help: did you mean `x`?
  --> src/test/compile-fail/E0559.rs:16:27
   |
16 |     let s = Field::Fool { joke: 0 }; //~ ERROR E0559
   |                           ^^^^

To:

error[E0559]: struct variant `Field::Fool` has no field named `joke`
  --> src/test/compile-fail/E0559.rs:16:27
   |
16 |     let s = Field::Fool { joke: 0 }; //~ ERROR E0559
   |                           ^^^^ did you mean `x`?