diff --git a/hugr-core/src/hugr/internal.rs b/hugr-core/src/hugr/internal.rs
index 1301457a4..ef9030557 100644
--- a/hugr-core/src/hugr/internal.rs
+++ b/hugr-core/src/hugr/internal.rs
@@ -35,7 +35,10 @@ pub trait HugrInternals {
 }
 
 impl HugrInternals for Hugr {
-    type Portgraph<'p> = &'p MultiPortGraph where Self: 'p;
+    type Portgraph<'p>
+        = &'p MultiPortGraph
+    where
+        Self: 'p;
 
     #[inline]
     fn portgraph(&self) -> Self::Portgraph<'_> {
@@ -54,7 +57,10 @@ impl HugrInternals for Hugr {
 }
 
 impl<T: HugrInternals> HugrInternals for &T {
-    type Portgraph<'p> = T::Portgraph<'p> where Self: 'p;
+    type Portgraph<'p>
+        = T::Portgraph<'p>
+    where
+        Self: 'p;
     delegate! {
         to (**self) {
             fn portgraph(&self) -> Self::Portgraph<'_>;
@@ -65,7 +71,10 @@ impl<T: HugrInternals> HugrInternals for &T {
 }
 
 impl<T: HugrInternals> HugrInternals for &mut T {
-    type Portgraph<'p> = T::Portgraph<'p> where Self: 'p;
+    type Portgraph<'p>
+        = T::Portgraph<'p>
+    where
+        Self: 'p;
     delegate! {
         to (**self) {
             fn portgraph(&self) -> Self::Portgraph<'_>;
@@ -76,7 +85,10 @@ impl<T: HugrInternals> HugrInternals for &mut T {
 }
 
 impl<T: HugrInternals> HugrInternals for Rc<T> {
-    type Portgraph<'p> = T::Portgraph<'p> where Self: 'p;
+    type Portgraph<'p>
+        = T::Portgraph<'p>
+    where
+        Self: 'p;
     delegate! {
         to (**self) {
             fn portgraph(&self) -> Self::Portgraph<'_>;
@@ -87,7 +99,10 @@ impl<T: HugrInternals> HugrInternals for Rc<T> {
 }
 
 impl<T: HugrInternals> HugrInternals for Arc<T> {
-    type Portgraph<'p> = T::Portgraph<'p> where Self: 'p;
+    type Portgraph<'p>
+        = T::Portgraph<'p>
+    where
+        Self: 'p;
     delegate! {
         to (**self) {
             fn portgraph(&self) -> Self::Portgraph<'_>;
diff --git a/hugr-core/src/hugr/views/root_checked.rs b/hugr-core/src/hugr/views/root_checked.rs
index 989719377..88b0ad020 100644
--- a/hugr-core/src/hugr/views/root_checked.rs
+++ b/hugr-core/src/hugr/views/root_checked.rs
@@ -49,7 +49,10 @@ impl<Root> RootChecked<&mut Hugr, Root> {
 }
 
 impl<H: AsRef<Hugr>, Root> HugrInternals for RootChecked<H, Root> {
-    type Portgraph<'p> = &'p MultiPortGraph where Self: 'p;
+    type Portgraph<'p>
+        = &'p MultiPortGraph
+    where
+        Self: 'p;
     delegate! {
         to self.as_ref() {
             fn portgraph(&self) -> Self::Portgraph<'_>;