Update code using rubocop's autocorrect linter

Author: tarebyte

Rakefile

@@ -1,10 +1,11 @@
 #!/usr/bin/env rake
+# frozen_string_literal: true
+
 # Add your own tasks in files placed in lib/tasks ending in .rake,
 # for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
 
-require File.expand_path('../config/application', __FILE__)
+require File.expand_path("../config/application", __FILE__)
 
 Rake.application.options.trace = true
 
 Gitscm::Application.load_tasks
-

app/controllers/about_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AboutController < ApplicationController
 
   def index