Minor cleanup

serde_codegen/src/field.rs

@@ -1,12 +1,12 @@
 use std::collections::HashMap;
 
+use aster;
+
 use syntax::ast;
 use syntax::attr;
 use syntax::ext::base::ExtCtxt;
 use syntax::ptr::P;
 
-use aster;
-
 use super::attr::FieldAttrs;
 
 enum Rename<'a> {