Update never_type feature gate ui test

Author: GuillaumeGomez

tests/ui/feature-gates/feature-gate-never_type.rs

@@ -13,5 +13,7 @@ impl Foo for Meeshka {
     type Wub = !; //~ ERROR type is experimental
 }
 
+pub fn look_ma_no_feature_gate<F: FnOnce() -> !>() {} //~ ERROR type is experimental
+
 fn main() {
 }

tests/ui/feature-gates/feature-gate-never_type.stderr

@@ -48,6 +48,16 @@ LL |     type Wub = !;
    = help: add `#![feature(never_type)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
-error: aborting due to 5 previous errors
+error[E0658]: the `!` type is experimental
+  --> $DIR/feature-gate-never_type.rs:16:47
+   |
+LL | pub fn look_ma_no_feature_gate<F: FnOnce() -> !>() {}
+   |                                               ^
+   |
+   = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
+   = help: add `#![feature(never_type)]` to the crate attributes to enable
+   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
+
+error: aborting due to 6 previous errors
 
 For more information about this error, try `rustc --explain E0658`.