Add manual annotations

Author: GuillaumeGomez

tests/ui/expect_tool_lint_rfc_2383.rs

@@ -30,11 +30,14 @@ mod rustc_warn {
     #[expect(dead_code)]
     //~^ ERROR: this lint expectation is unfulfilled
     //~| NOTE: `-D unfulfilled-lint-expectations` implied by `-D warnings`
+    //~| HELP: to override `-D warnings` add `#[allow(unfulfilled_lint_expectations)]`
     pub fn rustc_lints() {
         let x = 42;
 
         #[expect(invalid_nan_comparisons)]
         //~^ ERROR: this lint expectation is unfulfilled
+        //~| NOTE: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
+        //~| ERROR: this lint expectation is unfulfilled
         let _b = x == 5;
     }
 }

tests/ui/expect_tool_lint_rfc_2383.stderr

@@ -8,39 +8,39 @@ LL |     #[expect(dead_code)]
    = help: to override `-D warnings` add `#[allow(unfulfilled_lint_expectations)]`
 
 error: this lint expectation is unfulfilled
-  --> tests/ui/expect_tool_lint_rfc_2383.rs:36:18
+  --> tests/ui/expect_tool_lint_rfc_2383.rs:37:18
    |
 LL |         #[expect(invalid_nan_comparisons)]
    |                  ^^^^^^^^^^^^^^^^^^^^^^^
 
 error: this lint expectation is unfulfilled
-  --> tests/ui/expect_tool_lint_rfc_2383.rs:36:18
+  --> tests/ui/expect_tool_lint_rfc_2383.rs:37:18
    |
 LL |         #[expect(invalid_nan_comparisons)]
    |                  ^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: this lint expectation is unfulfilled
-  --> tests/ui/expect_tool_lint_rfc_2383.rs:107:14
+  --> tests/ui/expect_tool_lint_rfc_2383.rs:110:14
    |
 LL |     #[expect(clippy::almost_swapped)]
    |              ^^^^^^^^^^^^^^^^^^^^^^
 
 error: this lint expectation is unfulfilled
-  --> tests/ui/expect_tool_lint_rfc_2383.rs:115:14
+  --> tests/ui/expect_tool_lint_rfc_2383.rs:118:14
    |
 LL |     #[expect(clippy::bytes_nth)]
    |              ^^^^^^^^^^^^^^^^^
 
 error: this lint expectation is unfulfilled
-  --> tests/ui/expect_tool_lint_rfc_2383.rs:121:14
+  --> tests/ui/expect_tool_lint_rfc_2383.rs:124:14
    |
 LL |     #[expect(clippy::if_same_then_else)]
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: this lint expectation is unfulfilled
-  --> tests/ui/expect_tool_lint_rfc_2383.rs:127:14
+  --> tests/ui/expect_tool_lint_rfc_2383.rs:130:14
    |
 LL |     #[expect(clippy::overly_complex_bool_expr)]
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^