Use Error and Result from root in tests
diff --git a/src/lib.rs b/src/lib.rs
index 7c786f0..78408bc 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -664,8 +664,7 @@
 /// ```rust
 /// # extern crate syn;
 /// #
-/// use syn::Expr;
-/// use syn::parse::Result;
+/// use syn::{Expr, Result};
 ///
 /// fn run() -> Result<()> {
 ///     let code = "assert_eq!(u8::max_value(), 255)";