Set command ending in the client

src/command.rs

@@ -7,10 +7,10 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![unstable]
-
 //! Represents a valid complete SMTP command, ready to be sent to a server
 
+#![unstable]
+
 use std::fmt::{Show, Formatter, Result};
 use common::SP;