Rakefile in math-to-itex-0.6.0 vs Rakefile in math-to-itex-0.6.1

@@ -1,11 +1,17 @@
 #!/usr/bin/env rake
-require "bundler/gem_tasks"
+# frozen_string_literal: true
+
+require 'bundler/gem_tasks'
 require 'rake/testtask'
 
 Rake::TestTask.new do |t|
-  t.libs << "test"
+  t.libs << 'test'
   t.test_files = FileList['test/**/*_test.rb']
   t.verbose = true
 end
 
-task :default => [:test]
+task default: [:test]
+
+require 'rubocop/rake_task'
+
+RuboCop::RakeTask.new(:rubocop)