Fix f64 examples

diff --git a/src/libstd/f64.rs b/src/libstd/f64.rs
index ab8f2cd2fdfbdbd31107c10d53b314dbf1a200da..0a7176f9cc75e133ec2298b1f768a1d4ed150c24 100644 (file)
--- a/src/libstd/f64.rs
+++ b/src/libstd/f64.rs
@@ -971,15 +971,17 @@ pub fn atanh(self) -> f64 {
     }
 
     /// Returns max if self is greater than max, and min if self is less than min.
-    /// Otherwise this returns self.  Panics if min > max, min equals NaN, or max equals NaN.
+    /// Otherwise this returns self.  Panics if min > max, min is NaN, or max is NaN.
     ///
     /// # Examples
     ///
     /// ```
+    /// #![feature(clamp)]
+    /// use std::f64::NAN;
     /// assert!((-3.0f64).clamp(-2.0f64, 1.0f64) == -2.0f64);
     /// assert!((0.0f64).clamp(-2.0f64, 1.0f64) == 0.0f64);
     /// assert!((2.0f64).clamp(-2.0f64, 1.0f64) == 1.0f64);
-    /// assert!((NAN).clamp(-2.0f64, 1.0f64) == NAN);
+    /// assert!((NAN).clamp(-2.0f64, 1.0f64).is_nan());
     /// ```
     #[unstable(feature = "clamp", issue = "44095")]
     #[inline]