message: Change how the fix_deny_warnings_but_not_others test works to avoid breakage from new compiler suggestions
diff: @@ -561,7 +561,10 @@ fn fix_deny_warnings_but_not_others() {
  x
  }
  - fn bar() {}
  + pub fn bar() {
  + #[allow(unused_mut)]
  + let mut _y = 4;
  + }
  ",
  )
  .build();
  @@ -570,7 +573,7 @@ fn fix_deny_warnings_but_not_others() {
  .env("__CARGO_FIX_YOLO", "1")
  .run();
  assert!(!p.read_file("src/lib.rs").contains("let mut x = 3;"));
  - assert!(p.read_file("src/lib.rs").contains("fn bar() {}"));
  + assert!(p.read_file("src/lib.rs").contains("let mut _y = 4;"));
  }
  #[cargo_test]
  