Make doc examples compatible with stable
diff --git a/src/expr.rs b/src/expr.rs
index 4a39367..d4b689a 100644
--- a/src/expr.rs
+++ b/src/expr.rs
@@ -2349,9 +2349,10 @@
/// # Example
///
/// ```
- /// # extern crate syn;
- /// #
- /// use syn::{braced, token, Attribute, Block, Ident, Stmt, Token};
+ /// #[macro_use]
+ /// extern crate syn;
+ ///
+ /// use syn::{token, Attribute, Block, Ident, Stmt};
/// use syn::parse::{Parse, ParseStream, Result};
///
/// // Parse a function with no generics or parameter list.