remove new disambiguity

PSeitz · web-flow · commit 1150dbb2e1ed · 2017-12-31T09:10:56.000+01:00
diff --git a/src/lib.rs b/src/lib.rs
@@ -943,7 +943,7 @@ impl Rng for ThreadRng {
 ///     *x = rand::random()
 /// }
 ///
-/// // would be faster written as
+/// // can be made faster by caching thread_rng
 ///
 /// let mut rng = rand::thread_rng();
 ///
