Fix try wrapping expression in variant suggestion with struct field shorthand

[compiler-errors]

Fixes a broken suggestion: playground

before:

error[E0308]: mismatched types
 --> src/main.rs:7:19
  |
7 |     let x = Foo { bar };
  |                   ^^^ expected enum `Option`, found integer
  |
  = note: expected enum `Option<i32>`
             found type `{integer}`
help: try wrapping the expression in `Some`
  |
7 |     let x = Foo { Some(bar) };
  |                   +++++   +

after:

error[E0308]: mismatched types
 --> src/main.rs:7:19
  |
7 |     let x = Foo { bar };
  |                   ^^^ expected enum `Option`, found integer
  |
  = note: expected enum `Option<i32>`
             found type `{integer}`
help: try wrapping the expression in `Some`
  |
7 |     let x = Foo { bar: Some(bar) };
  |                   ~~~~~~~~~~~~~~

r? @m-ou-se
since you touched the code last in #91080

[compiler-errors]

r? @camelid

I fixed those places you asked for, and did some drive-by fixes as well.

[camelid]

The error output looks really nice, but unfortunately I don't think I have time to review the rest of this PR :)

r? @davidtwco

[davidtwco]

Sorry for the delay in reviewing, this looks great.

[davidtwco]

@bors r+ rollup

[bors]

📌 Commit 272fb23 has been approved by davidtwco