Rakefile in review-2.3.0 vs Rakefile in review-2.4.0

@@ -1,30 +1,30 @@
 begin
   require 'bundler'
   Bundler::GemHelper.install_tasks
 rescue LoadError
   # ignore if bundler does not exist
-  warn "Bundler not found"
+  warn 'Bundler not found'
 end
 
 require 'rubygems'
 require 'rake/clean'
 
-task :default => [:test, :rubocop]
+task default: %i[test rubocop]
 
-desc "Check with rubocop"
+desc 'Check with rubocop'
 task :rubocop do
   begin
     require 'rubocop/rake_task'
     RuboCop::RakeTask.new
   rescue LoadError
-    warn "rubocop not found"
+    warn 'rubocop not found'
   end
 end
 
 task :test do
-  ruby("test/run_test.rb")
+  ruby('test/run_test.rb')
 end
 
 begin
   require 'rcov/rcovtask'
   Rcov::RcovTask.new do |t|
@@ -33,20 +33,20 @@
     t.libs << 'test'
     t.pattern = 'test/test_*.rb'
     t.verbose = true
   end
 rescue LoadError
-  warn "rcov not found"
+  warn 'rcov not found'
 end
 
 begin
   require 'rdoc/task'
   Rake::RDocTask.new do |rdoc|
-    version = File.exist?('VERSION') ? File.read('VERSION') : ""
+    version = File.exist?('VERSION') ? File.read('VERSION') : ''
     rdoc.rdoc_dir = 'rdoc'
     rdoc.title = "review #{version}"
     rdoc.rdoc_files.include('README*')
     rdoc.rdoc_files.include('lib/**/*.rb')
   end
 rescue LoadError
-  warn "rdoc not found"
+  warn 'rdoc not found'
 end