Tweak note condition

compiler/rustc_lint/src/static_mut_refs.rs

@@ -214,7 +214,7 @@ fn interior_mutability_suggestion(
 
     let sugg =
         static_mutability_span(cx, def_id).map(|span| StaticMutRefsInteriorMutabilitySugg { span });
-    (true, sugg)
+    (sugg.is_none(), sugg)
 }
 
 fn static_mutability_span(cx: &LateContext<'_>, def_id: DefId) -> Option<Span> {

tests/ui/lint/static-mut-refs-interior-mutability.stderr

@@ -4,9 +4,8 @@ error: creating a shared reference to mutable static
 LL |     let _lock = unsafe { STDINOUT_MUTEX.lock().unwrap() };
    |                          ^^^^^^^^^^^^^^^^^^^^^ shared reference to mutable static
    |
-   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
-   = help: use a type that relies on "interior mutability" instead; to read more on this, visit <https://doc.rust-lang.org/reference/interior-mutability.html>
+   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
    = note: `#[deny(static_mut_refs)]` (part of `#[deny(rust_2024_compatibility)]`) on by default
 help: this type already provides "interior mutability", so its binding doesn't need to be declared as mutable
    |

tests/ui/statics/static-lazy-init-with-arena-set.stderr

@@ -10,7 +10,6 @@ LL | |             });
    | |______________^ shared reference to mutable static
    |
    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
-   = help: use a type that relies on "interior mutability" instead; to read more on this, visit <https://doc.rust-lang.org/reference/interior-mutability.html>
    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
    = note: `#[warn(static_mut_refs)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
 help: this type already provides "interior mutability", so its binding doesn't need to be declared as mutable