Rollup merge of #23329 - jbcrail:rm-syntax-highlight, r=sanxiyn

 As suggested by @steveklabnik in #23254, I removed the redundant Rust syntax highlighting from the documentation.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libstd/old_io/mod.rs b/src/libstd/old_io/mod.rs
index e1341e0e5cf..15a80e34451 100644
--- a/src/libstd/old_io/mod.rs
+++ b/src/libstd/old_io/mod.rs
@@ -1410,7 +1410,7 @@ pub trait Buffer: Reader {
     ///
     /// # Examples
     ///
-    /// ```rust
+    /// ```
     /// use std::old_io::BufReader;
     ///
     /// let mut reader = BufReader::new(b"hello\nworld");