Auto merge of #50719 - frewsxcv:frewsxcv-iterator-zip, r=alexcrichton

Fix incorrect statement about return value for Iterator::zip.

Fixes https://github.com/rust-lang/rust/issues/50225.

src/libcore/iter/iterator.rs

@@ -366,8 +366,7 @@ fn chain<U>(self, other: U) -> Chain<Self, U::IntoIter> where
     ///
     /// In other words, it zips two iterators together, into a single one.
     ///
-    /// When either iterator returns [`None`], all further calls to [`next`]
-    /// will return [`None`].
+    /// If either iterator returns [`None`], [`next`] will return [`None`].
     ///
     /// # Examples
     ///