Fix example for `ptr::replace`

diff --git a/src/libcore/ptr.rs b/src/libcore/ptr.rs
index 98d5030477b51814d119a1cd4f4d72a8b9c9a801..9069feab06c84b07b94e0d785575f31014efe636 100644 (file)
--- a/src/libcore/ptr.rs
+++ b/src/libcore/ptr.rs
@@ -337,7 +337,7 @@ unsafe fn swap_nonoverlapping_bytes(x: *mut u8, y: *mut u8, len: usize) {
 /// // `mem::replace` would have the same effect without requiring the unsafe
 /// // block.
 /// let b = unsafe {
-///     ptr::replace(&mut a[0], 'r')
+///     ptr::replace(&mut rust[0], 'r')
 /// };
 ///
 /// assert_eq!(b, 'b');