diff --git a/serde_derive/src/bound.rs b/serde_derive/src/bound.rs
index 080cf7f0..d163eeac 100644
--- a/serde_derive/src/bound.rs
+++ b/serde_derive/src/bound.rs
@@ -157,7 +157,10 @@ pub fn with_bound(
         fn visit_macro(&mut self, _mac: &'ast syn::Macro) {}
     }
 
-    let all_type_params = generics.type_params().map(|param| param.ident.clone()).collect();
+    let all_type_params = generics
+        .type_params()
+        .map(|param| param.ident.clone())
+        .collect();
 
     let mut visitor = FindTyParams {
         all_type_params: all_type_params,
@@ -260,7 +263,9 @@ pub fn with_lifetime_bound(generics: &syn::Generics, lifetime: &str) -> syn::Gen
                     param.bounds.push(bound.clone());
                 }
                 syn::GenericParam::Type(ref mut param) => {
-                    param.bounds.push(syn::TypeParamBound::Lifetime(bound.clone()));
+                    param
+                        .bounds
+                        .push(syn::TypeParamBound::Lifetime(bound.clone()));
                 }
                 syn::GenericParam::Const(_) => {}
             }
diff --git a/serde_derive/src/de.rs b/serde_derive/src/de.rs
index ad105398..216e4b34 100644
--- a/serde_derive/src/de.rs
+++ b/serde_derive/src/de.rs
@@ -789,7 +789,11 @@ fn deserialize_seq_in_place(
     }
 }
 
-fn deserialize_newtype_struct(type_path: &TokenStream, params: &Parameters, field: &Field) -> TokenStream {
+fn deserialize_newtype_struct(
+    type_path: &TokenStream,
+    params: &Parameters,
+    field: &Field,
+) -> TokenStream {
     let delife = params.borrowed.de_lifetime();
     let field_ty = field.ty;
 
@@ -1927,7 +1931,12 @@ fn deserialize_custom_identifier(
 
     let names_idents: Vec<_> = ordinary
         .iter()
-        .map(|variant| (variant.attrs.name().deserialize_name(), variant.ident.clone()))
+        .map(|variant| {
+            (
+                variant.attrs.name().deserialize_name(),
+                variant.ident.clone(),
+            )
+        })
         .collect();
 
     let names = names_idents.iter().map(|&(ref name, _)| name);
@@ -2828,9 +2837,9 @@ impl<'a> ToTokens for InPlaceImplGenerics<'a> {
                     param.bounds.push(place_lifetime.lifetime.clone());
                 }
                 syn::GenericParam::Type(ref mut param) => {
-                    param
-                        .bounds
-                        .push(syn::TypeParamBound::Lifetime(place_lifetime.lifetime.clone()));
+                    param.bounds.push(syn::TypeParamBound::Lifetime(
+                        place_lifetime.lifetime.clone(),
+                    ));
                 }
                 syn::GenericParam::Const(_) => {}
             }
diff --git a/serde_derive/src/fragment.rs b/serde_derive/src/fragment.rs
index 769d2552..eb019453 100644
--- a/serde_derive/src/fragment.rs
+++ b/serde_derive/src/fragment.rs
@@ -6,9 +6,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+use proc_macro2::TokenStream;
 use quote::ToTokens;
 use syn::token;
-use proc_macro2::TokenStream;
 
 pub enum Fragment {
     /// Tokens that can be used as an expression.
diff --git a/serde_derive/src/internals/attr.rs b/serde_derive/src/internals/attr.rs
index abfb005b..6779f4b1 100644
--- a/serde_derive/src/internals/attr.rs
+++ b/serde_derive/src/internals/attr.rs
@@ -948,9 +948,7 @@ impl Field {
 
                     // Parse `#[serde(borrow = "'a + 'b")]`
                     Meta(NameValue(ref m)) if m.ident == "borrow" => {
-                        if let Ok(lifetimes) =
-                            parse_lit_into_lifetimes(cx, &m.ident, &m.lit)
-                        {
+                        if let Ok(lifetimes) = parse_lit_into_lifetimes(cx, &m.ident, &m.lit) {
                             if let Ok(borrowable) = borrowable_lifetimes(cx, &ident, &field.ty) {
                                 for lifetime in &lifetimes {
                                     if !borrowable.contains(lifetime) {
diff --git a/serde_derive/src/internals/check.rs b/serde_derive/src/internals/check.rs
index 0caa4b50..b42a30a3 100644
--- a/serde_derive/src/internals/check.rs
+++ b/serde_derive/src/internals/check.rs
@@ -310,7 +310,9 @@ fn check_transparent(cx: &Ctxt, cont: &mut Container, derive: Derive) {
     for field in fields {
         if allow_transparent(field, derive) {
             if transparent_field.is_some() {
-                cx.error("#[serde(transparent)] requires struct to have at most one transparent field");
+                cx.error(
+                    "#[serde(transparent)] requires struct to have at most one transparent field",
+                );
                 return;
             }
             transparent_field = Some(field);
@@ -326,7 +328,7 @@ fn check_transparent(cx: &Ctxt, cont: &mut Container, derive: Derive) {
             Derive::Deserialize => {
                 cx.error("#[serde(transparent)] requires at least one field that is neither skipped nor has a default");
             }
-        }
+        },
     }
 }