Update lint plugin sample code.

diff --git a/src/doc/unstable-book/src/language-features/plugin.md b/src/doc/unstable-book/src/language-features/plugin.md
index 2f645cf0470c0bc7488aaf394286ce8d89fb5107..19ece09509078d450c11f6a1efe0f09d12900139 100644 (file)
--- a/src/doc/unstable-book/src/language-features/plugin.md
+++ b/src/doc/unstable-book/src/language-features/plugin.md
@@ -183,6 +183,8 @@ that warns about any item named `lintme`.
 ```rust,ignore
 #![feature(plugin_registrar)]
 #![feature(box_syntax, rustc_private)]
+#![feature(macro_vis_matcher)]
+#![feature(macro_at_most_once_rep)]
 
 extern crate syntax;