Use Error and Result from root in tests
diff --git a/src/group.rs b/src/group.rs
index 84a19fd..026ece4 100644
--- a/src/group.rs
+++ b/src/group.rs
@@ -101,8 +101,8 @@
/// #[macro_use]
/// extern crate syn;
///
-/// use syn::{token, Ident, Type};
-/// use syn::parse::{Parse, ParseStream, Result};
+/// use syn::{token, Ident, Result, Type};
+/// use syn::parse::{Parse, ParseStream};
/// use syn::punctuated::Punctuated;
///
/// // Parse a simplified tuple struct syntax like:
@@ -161,8 +161,8 @@
/// #
/// #[macro_use]
/// extern crate syn;
-/// use syn::{token, Ident, Type};
-/// use syn::parse::{Parse, ParseStream, Result};
+/// use syn::{token, Ident, Result, Type};
+/// use syn::parse::{Parse, ParseStream};
/// use syn::punctuated::Punctuated;
///
/// // Parse a simplified struct syntax like:
@@ -246,8 +246,8 @@
/// extern crate proc_macro2;
///
/// use proc_macro2::TokenStream;
-/// use syn::token;
-/// use syn::parse::{Parse, ParseStream, Result};
+/// use syn::{token, Result};
+/// use syn::parse::{Parse, ParseStream};
///
/// // Parse an outer attribute like:
/// //