Deny warnings when testing

Author: alexcrichton

src/lib.rs

@@ -361,9 +361,9 @@
 //! characters in the search text and `m` is the number of instructions in a
 //! compiled expression.
 
-#![allow(unknown_features)]
 #![feature(macro_rules, slicing_syntax, globs)]
 #![deny(missing_docs)]
+#![cfg_attr(test, deny(warnings))]
 #![doc(html_logo_url = "http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
        html_favicon_url = "http://www.rust-lang.org/favicon.ico",
        html_root_url = "http://doc.rust-lang.org/regex/")]