use crate::base::{self, *};
use crate::proc_macro_server;
+use rustc_span::symbol::sym;
use syntax::ast::{self, ItemKind, MetaItemKind, NestedMetaItem};
use syntax::errors::{Applicability, FatalError};
-use syntax::symbol::sym;
use syntax::token;
use syntax::tokenstream::{self, TokenStream};