A lot :)

app/controllers/checklists_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ChecklistsController < ApplicationController
   before_action :set_checklist, only: %i[show edit update destroy]
 
@@ -7,8 +9,7 @@ class ChecklistsController < ApplicationController
   end
 
   # GET /checklists/1
-  def show
-  end
+  def show; end
 
   # GET /checklists/new
   def new
@@ -16,15 +17,14 @@ class ChecklistsController < ApplicationController
   end
 
   # GET /checklists/1/edit
-  def edit
-  end
+  def edit; end
 
   # POST /checklists
   def create
     @checklist = Checklist.new(checklist_params)
 
     if @checklist.save
-      redirect_to @checklist, notice: 'Checklist was successfully created.'
+      redirect_to @checklist, notice: "Checklist was successfully created."
     else
       render :new, status: :unprocessable_entity
     end
@@ -33,7 +33,7 @@ class ChecklistsController < ApplicationController
   # PATCH/PUT /checklists/1
   def update
     if @checklist.update(checklist_params)
-      redirect_to @checklist, notice: 'Checklist was successfully updated.', status: :see_other
+      redirect_to @checklist, notice: "Checklist was successfully updated.", status: :see_other
     else
       render :edit, status: :unprocessable_entity
     end
@@ -42,7 +42,7 @@ class ChecklistsController < ApplicationController
   # DELETE /checklists/1
   def destroy
     @checklist.destroy!
-    redirect_to checklists_url, notice: 'Checklist was successfully destroyed.', status: :see_other
+    redirect_to checklists_url, notice: "Checklist was successfully destroyed.", status: :see_other
   end
 
   private