update format

yaserde_derive/src/ser/expand_enum.rs

@@ -5,7 +5,7 @@ use std::collections::BTreeMap;
 use syn::Fields;
 use syn::Ident;
 use syn::DataEnum;
-use proc_macro2::{TokenStream, Span};
+use proc_macro2::{Span, TokenStream};
 
 pub fn serialize(
   data_enum: &DataEnum,

yaserde_derive/src/ser/expand_struct.rs

@@ -4,7 +4,7 @@ use quote::TokenStreamExt;
 use std::collections::BTreeMap;
 use syn::Ident;
 use syn::DataStruct;
-use proc_macro2::{TokenStream, Span};
+use proc_macro2::{Span, TokenStream};
 use std::string::ToString;
 
 pub fn serialize(

yaserde_derive/src/ser/mod.rs

@@ -2,7 +2,7 @@ pub mod expand_enum;
 pub mod expand_struct;
 
 use attribute;
-use proc_macro2::{TokenStream, Span};
+use proc_macro2::{Span, TokenStream};
 use syn;
 use syn::Ident;