From c9099ff11b1d44a4942f448750cafe8e5c2fd915 Mon Sep 17 00:00:00 2001
From: Jack O'Connor <oconnor663@gmail.com>
Date: Wed, 20 Sep 2017 01:25:47 -0400
Subject: [PATCH] fix an incorrect assertion in the doc example for
 `std::io::copy`

---
 src/libstd/io/util.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/libstd/io/util.rs b/src/libstd/io/util.rs
index 88f4214296d9c..bff4e5caaa16f 100644
--- a/src/libstd/io/util.rs
+++ b/src/libstd/io/util.rs
@@ -40,9 +40,10 @@ use mem;
 ///
 /// io::copy(&mut reader, &mut writer)?;
 ///
-/// assert_eq!(reader, &writer[..]);
+/// assert_eq!(&b"hello"[..], &writer[..]);
 /// # Ok(())
 /// # }
+/// # foo().unwrap();
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
 pub fn copy<R: ?Sized, W: ?Sized>(reader: &mut R, writer: &mut W) -> io::Result<u64>