diff --git a/installer/templates/phx_web/components/core_components.ex b/installer/templates/phx_web/components/core_components.ex
index 40b42c3d05..85586fecaf 100644
--- a/installer/templates/phx_web/components/core_components.ex
+++ b/installer/templates/phx_web/components/core_components.ex
@@ -302,7 +302,9 @@ defmodule <%= @web_namespace %>.CoreComponents do
 
   def input(%{type: "checkbox"} = assigns) do
     assigns =
-      assign_new(assigns, :checked, fn -> Phoenix.HTML.Form.normalize_value("checkbox", assigns[:value]) end)
+      assign_new(assigns, :checked, fn ->
+        Phoenix.HTML.Form.normalize_value("checkbox", assigns[:value])
+      end)
 
     ~H"""
     <div phx-feedback-for={@name}>
diff --git a/priv/templates/phx.gen.live/core_components.ex b/priv/templates/phx.gen.live/core_components.ex
index 40b42c3d05..85586fecaf 100644
--- a/priv/templates/phx.gen.live/core_components.ex
+++ b/priv/templates/phx.gen.live/core_components.ex
@@ -302,7 +302,9 @@ defmodule <%= @web_namespace %>.CoreComponents do
 
   def input(%{type: "checkbox"} = assigns) do
     assigns =
-      assign_new(assigns, :checked, fn -> Phoenix.HTML.Form.normalize_value("checkbox", assigns[:value]) end)
+      assign_new(assigns, :checked, fn ->
+        Phoenix.HTML.Form.normalize_value("checkbox", assigns[:value])
+      end)
 
     ~H"""
     <div phx-feedback-for={@name}>