A lot :)

app/controllers/links_controller.rb

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