needless_raw_string_hashes lint on inline snapshots

[dtolnay]

What happened?

Calling your attention to the fact that as of nightly-2023-07-03, clippy has begun emitting a new lint on insta-generated inline snapshots.

I think the distinctive @r###" … "### is fine to keep, so hopefully we can suppress the lint with a allow(clippy::needless_raw_string_hashes) in the right place in insta's macros.

Reproduction steps

#[test]
fn repro() {
    insta::assert_debug_snapshot!(("x", 'x', b'x'), @r###"
    (
        "x",
        'x',
        120,
    )
    "###);
}

$ cargo clippy --tests

warning: unnecessary hashes around raw string literal
 --> src/main.rs:3:54
  |
3 |       insta::assert_debug_snapshot!(("x", 'x', b'x'), @r###"
  |  ______________________________________________________^
4 | |     (
5 | |         "x",
6 | |         'x',
7 | |         120,
8 | |     )
9 | |     "###);
  | |________^
  |
  = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_raw_string_hashes
  = note: `#[warn(clippy::needless_raw_string_hashes)]` on by default
help: try
  |
3 ~     insta::assert_debug_snapshot!(("x", 'x', b'x'), @r#"
4 +     (
5 +         "x",
6 +         'x',
7 +         120,
8 +     )
9 ~     "#);
  |

Insta Version

1.30.0

rustc Version

nightly-2023-07-03

What did you expect?

No response