`sudo CI=green` && Review changes <3

compiler/rustc_builtin_macros/src/lib.rs

@@ -5,6 +5,7 @@
 #![allow(internal_features)]
 #![allow(rustc::diagnostic_outside_of_impl)]
 #![allow(rustc::untranslatable_diagnostic)]
+#![cfg_attr(bootstrap, feature(lint_reasons))]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![doc(rust_logo)]
 #![feature(assert_matches)]
@@ -12,7 +13,6 @@
 #![feature(decl_macro)]
 #![feature(if_let_guard)]
 #![feature(let_chains)]
-#![cfg_attr(bootstrap, feature(lint_reasons))]
 #![feature(proc_macro_internals)]
 #![feature(proc_macro_quote)]
 #![feature(rustdoc_internals)]

compiler/rustc_lint_defs/src/builtin.rs

@@ -608,7 +608,7 @@ declare_lint! {
 }
 
 declare_lint! {
-    /// The `unfulfilled_lint_expectations` lint warns if a lint expectation is
+    /// The `unfulfilled_lint_expectations` lint detects when a lint expectation is
     /// unfulfilled.
     ///
     /// ### Example

src/doc/rustc/src/lints/levels.md

@@ -47,8 +47,8 @@ fn main() {
     #[expect(unused_variables)]
     let unused = "Everyone ignores me";
 
-    #[expect(unused_variables)]
-    let used = "I'm useful";
+    #[expect(unused_variables)] // `unused_variables` lint is not emitted
+    let used = "I'm useful";    // the expectation is therefore unfulfilled
     println!("The `used` value is equal to: {:?}", used);
 }
 ```
@@ -65,8 +65,8 @@ warning: this lint expectation is unfulfilled
   = note: `#[warn(unfulfilled_lint_expectations)]` on by default
 ```
 
-This level can only be defined via the `#[expect]` attribute and not via the
-console. Lints with the special 'force-warn' lint will still be emitted as usual.
+This level can only be defined via the `#[expect]` attribute, there is no equivalent
+flag. Lints with the special 'force-warn' level will still be emitted as usual.
 
 ## warn
 

src/tools/clippy/tests/ui-toml/macro_metavars_in_unsafe/default/test.rs

@@ -1,5 +1,5 @@
 //! Tests macro_metavars_in_unsafe with default configuration
-#![feature(decl_macro, lint_reasons)]
+#![feature(decl_macro)]
 #![warn(clippy::macro_metavars_in_unsafe)]
 #![allow(clippy::no_effect)]
 

src/tools/clippy/tests/ui-toml/macro_metavars_in_unsafe/default/test.stderr

@@ -1,12 +1,3 @@
-error: the feature `lint_reasons` has been stable since 1.81.0-dev and no longer requires an attribute to enable
-  --> tests/ui-toml/macro_metavars_in_unsafe/default/test.rs:2:24
-   |
-LL | #![feature(decl_macro, lint_reasons)]
-   |                        ^^^^^^^^^^^^
-   |
-   = note: `-D stable-features` implied by `-D warnings`
-   = help: to override `-D warnings` add `#[allow(stable_features)]`
-
 error: this macro expands metavariables in an unsafe block
   --> tests/ui-toml/macro_metavars_in_unsafe/default/test.rs:19:9
    |
@@ -192,5 +183,5 @@ LL | |         }
    = help: consider expanding any metavariables outside of this block, e.g. by storing them in a variable
    = help: ... or also expand referenced metavariables in a safe context to require an unsafe block at callsite
 
-error: aborting due to 15 previous errors
+error: aborting due to 14 previous errors
 

tests/ui/sse2.rs

@@ -2,7 +2,6 @@
 
 #![allow(stable_features)]
 #![feature(cfg_target_feature)]
-#![feature(lint_reasons)]
 
 use std::env;