Update let_underscore.rs

diff --git a/compiler/rustc_lint/src/let_underscore.rs b/compiler/rustc_lint/src/let_underscore.rs
index c59f56756c6b716f9d5255bb28e3717038e39365..11ceb4e22ae8331fe78a28037584e53bbf225121 100644 (file)
--- a/compiler/rustc_lint/src/let_underscore.rs
+++ b/compiler/rustc_lint/src/let_underscore.rs
@@ -11,7 +11,7 @@
     /// scope.
     ///
     /// ### Example
-    /// ```rust,compile_fail
+    /// ```
     /// struct SomeStruct;
     /// impl Drop for SomeStruct {
     ///     fn drop(&mut self) {
@@ -56,7 +56,7 @@
     /// of at end of scope, which is typically incorrect.
     ///
     /// ### Example
-    /// ```compile_fail
+    /// ```rust,compile_fail
     /// use std::sync::{Arc, Mutex};
     /// use std::thread;
     /// let data = Arc::new(Mutex::new(0));