prefer to use double quotes string literals

Author: hsbt

.rubocop.yml

@@ -4,8 +4,9 @@ AllCops:
   Exclude:
     - rake.gemspec
 
-StringLiterals:
-  Enabled: false
+Style/StringLiterals:
+  Enabled: true
+  EnforcedStyle: double_quotes
 
 SpaceAroundEqualsInParameterDefault:
   Enabled: false

Gemfile

@@ -1,3 +1,3 @@
-source 'https://rubygems.org'
+source "https://rubygems.org"
 
 gemspec

Rakefile

@@ -6,33 +6,33 @@
 # This file may be distributed under an MIT style license.  See
 # MIT-LICENSE for details.
 
-lib = File.expand_path('../lib', __FILE__)
+lib = File.expand_path("../lib", __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 
-require 'bundler/gem_tasks'
-require 'rake/testtask'
-require 'rdoc/task'
+require "bundler/gem_tasks"
+require "rake/testtask"
+require "rdoc/task"
 
 Rake::TestTask.new(:test) do |t|
   t.libs << "test"
   t.verbose = true
-  t.test_files = FileList['test/**/test_*.rb']
+  t.test_files = FileList["test/**/test_*.rb"]
 end
 
 RDoc::Task.new do |doc|
-  doc.main   = 'README.rdoc'
-  doc.title  = 'Rake -- Ruby Make'
+  doc.main   = "README.rdoc"
+  doc.title  = "Rake -- Ruby Make"
   doc.rdoc_files = FileList.new %w[lib MIT-LICENSE doc/**/*.rdoc *.rdoc]
-  doc.rdoc_dir = 'html'
+  doc.rdoc_dir = "html"
 end
 
 task ghpages: :rdoc do
   `git checkout gh-pages`
-  require 'fileutils'
-  FileUtils.rm_rf '/tmp/html'
-  FileUtils.mv 'html', '/tmp'
-  FileUtils.rm_rf '*'
-  FileUtils.cp_r Dir.glob('/tmp/html/*'), '.'
+  require "fileutils"
+  FileUtils.rm_rf "/tmp/html"
+  FileUtils.mv "html", "/tmp"
+  FileUtils.rm_rf "*"
+  FileUtils.cp_r Dir.glob("/tmp/html/*"), "."
 end
 
 task default: :test

exe/rake

@@ -22,6 +22,6 @@
 # IN THE SOFTWARE.
 #++
 
-require 'rake'
+require "rake"
 
 Rake.application.run

lib/rake.rb

@@ -22,44 +22,44 @@
 
 module Rake; end
 
-require 'rake/version'
+require "rake/version"
 
-require 'rbconfig'
-require 'fileutils'
-require 'singleton'
-require 'monitor'
-require 'optparse'
-require 'ostruct'
+require "rbconfig"
+require "fileutils"
+require "singleton"
+require "monitor"
+require "optparse"
+require "ostruct"
 
-require 'rake/ext/string'
-require 'rake/ext/fixnum'
+require "rake/ext/string"
+require "rake/ext/fixnum"
 
-require 'rake/win32'
+require "rake/win32"
 
-require 'rake/linked_list'
-require 'rake/cpu_counter'
-require 'rake/scope'
-require 'rake/task_argument_error'
-require 'rake/rule_recursion_overflow_error'
-require 'rake/rake_module'
-require 'rake/trace_output'
-require 'rake/pseudo_status'
-require 'rake/task_arguments'
-require 'rake/invocation_chain'
-require 'rake/task'
-require 'rake/file_task'
-require 'rake/file_creation_task'
-require 'rake/multi_task'
-require 'rake/dsl_definition'
-require 'rake/file_utils_ext'
-require 'rake/file_list'
-require 'rake/default_loader'
-require 'rake/early_time'
-require 'rake/late_time'
-require 'rake/name_space'
-require 'rake/task_manager'
-require 'rake/application'
-require 'rake/backtrace'
+require "rake/linked_list"
+require "rake/cpu_counter"
+require "rake/scope"
+require "rake/task_argument_error"
+require "rake/rule_recursion_overflow_error"
+require "rake/rake_module"
+require "rake/trace_output"
+require "rake/pseudo_status"
+require "rake/task_arguments"
+require "rake/invocation_chain"
+require "rake/task"
+require "rake/file_task"
+require "rake/file_creation_task"
+require "rake/multi_task"
+require "rake/dsl_definition"
+require "rake/file_utils_ext"
+require "rake/file_list"
+require "rake/default_loader"
+require "rake/early_time"
+require "rake/late_time"
+require "rake/name_space"
+require "rake/task_manager"
+require "rake/application"
+require "rake/backtrace"
 
 $trace = false