From c21b7e17d4c19b4bf7248eab2af6d37dc25465f3 Mon Sep 17 00:00:00 2001
From: Huon Wilson <dbau.pp+github@gmail.com>
Date: Thu, 26 Mar 2015 12:00:36 +1100
Subject: [PATCH] Feature gating is strict now.

---
 src/lib.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib.rs b/src/lib.rs
index ee2d6b7..e1ef089 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -18,7 +18,7 @@
 //! approximate a square root to arbitrary precision:
 //!
 //! ```
-//! # #![allow(unstable)]
+//! # #![feature(core)]
 //! extern crate num;
 //!
 //! use std::num::FromPrimitive;