Fix "unkown clippy lint" error in UI test.

Author: Darth-Revan

src/lintlist/mod.rs

@@ -731,14 +731,14 @@ pub const ALL_LINTS: [Lint; 308] = [
     Lint {
         name: "inherent_to_string",
         group: "style",
-        desc: "type implements inherent method \'to_string()\', but should instead implement the \'Display\' trait",
+        desc: "type implements inherent method `to_string()`, but should instead implement the `Display` trait",
         deprecation: None,
         module: "inherent_to_string",
     },
     Lint {
         name: "inherent_to_string_shadow_display",
         group: "correctness",
-        desc: "type implements inherent method \'to_string()\', which gets shadowed by the implementation of the \'Display\' trait ",
+        desc: "type implements inherent method `to_string()`, which gets shadowed by the implementation of the `Display` trait ",
         deprecation: None,
         module: "inherent_to_string",
     },

tests/ui/inherent_to_string.rs

@@ -1,5 +1,5 @@
 #![warn(clippy::inherent_to_string)]
-#![deny(clippy::inherent_to_string_shadow)]
+#![deny(clippy::inherent_to_string_shadow_display)]
 
 use std::fmt;
 

tests/ui/inherent_to_string.stderr

@@ -17,16 +17,12 @@ LL | |         "C.to_string()".to_string()
 LL | |     }
    | |_____^
    |
-   = note: #[deny(clippy::inherent_to_string_shadow_display)] on by default
-   = help: remove the inherent method from type `C`
-
-error: unknown clippy lint: clippy::inherent_to_string_shadow
+note: lint level defined here
   --> $DIR/inherent_to_string.rs:2:9
    |
-LL | #![deny(clippy::inherent_to_string_shadow)]
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: `-D clippy::unknown-clippy-lints` implied by `-D warnings`
+LL | #![deny(clippy::inherent_to_string_shadow_display)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = help: remove the inherent method from type `C`
 
-error: aborting due to 3 previous errors
+error: aborting due to 2 previous errors