Clarify wording on f64::round() and f32::round()

"Round half-way cases" is a little confusing (it's a 'garden path
sentence' as it's not immediately clear whether round is an adjective
or verb).

Make this sentence longer and clearer.

2 files changed, 4 insertions, 4 deletions

diff --git a/library/std/src/f32.rs b/library/std/src/f32.rs
index 4e300762463..6b1f0cba82d 100644
--- a/library/std/src/f32.rs
+++ b/library/std/src/f32.rs
@@ -69,8 +69,8 @@ impl f32 {
         unsafe { intrinsics::ceilf32(self) }
     }
 
-    /// Returns the nearest integer to `self`. Round half-way cases away from
-    /// `0.0`.
+    /// Returns the nearest integer to `self`. If a value is half-way between two
+    /// integers, round away from `0.0`.
     ///
     /// # Examples
     ///
diff --git a/library/std/src/f64.rs b/library/std/src/f64.rs
index ec67fdad4f7..16359766b51 100644
--- a/library/std/src/f64.rs
+++ b/library/std/src/f64.rs
@@ -69,8 +69,8 @@ impl f64 {
         unsafe { intrinsics::ceilf64(self) }
     }
 
-    /// Returns the nearest integer to `self`. Round half-way cases away from
-    /// `0.0`.
+    /// Returns the nearest integer to `self`. If a value is half-way between two
+    /// integers, round away from `0.0`.
     ///
     /// # Examples
     ///