Merge pull request #187 from tatref/patch-1

Fix name of argument in doc
diff --git a/src/distributions/mod.rs b/src/distributions/mod.rs
index 63856a5..5de8efb 100644
--- a/src/distributions/mod.rs
+++ b/src/distributions/mod.rs
@@ -133,7 +133,7 @@
     ///
     /// Panics if:
     ///
-    /// - `v` is empty
+    /// - `items` is empty
     /// - the total weight is 0
     /// - the total weight is larger than a `u32` can contain.
     pub fn new(items: &'a mut [Weighted<T>]) -> WeightedChoice<'a, T> {