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-rw-r--r--src/libstd/io/mod.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libstd/io/mod.rs b/src/libstd/io/mod.rs
index c71ab514695..1c48b20c444 100644
--- a/src/libstd/io/mod.rs
+++ b/src/libstd/io/mod.rs
@@ -1284,7 +1284,7 @@ impl<'a> Writer for &'a mut (Writer+'a) {
 ///     process_input(tee);
 /// }
 ///
-/// println!("input processed: {}", output);
+/// println!("input processed: {:?}", output);
 /// # }
 /// ```
 pub struct RefWriter<'a, W:'a> {