Add entry to the Unstable Book

melothemarten · melothemarten · commit 49555172016d · 2017-05-15T17:00:02.000-03:00
diff --git a/src/doc/unstable-book/src/library-features/iterator-step-by.md b/src/doc/unstable-book/src/library-features/iterator-step-by.md
@@ -0,0 +1,7 @@
+# `iterator_step_by`
+
+The tracking issue for this feature is: [#27741]
+
+[#27741]: https://github.com/rust-lang/rust/issues/27741
+
+------------------------
