diff --git a/Rakefile b/Rakefile
index 1d70ce96ea..02e9e5997c 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,8 +1,8 @@
-require 'net/http'
+require "net/http"
 
-$:.unshift File.expand_path('..', __FILE__)
+$:.unshift File.expand_path("..", __FILE__)
 require "tasks/release"
-require 'railties/lib/rails/api/task'
+require "railties/lib/rails/api/task"
 
 desc "Build gem files for all projects"
 task :build => "all:build"
@@ -13,7 +13,7 @@ task :prep_release => "all:prep_release"
 desc "Release all gems to rubygems and create a tag"
 task :release => "all:release"
 
-desc 'Run all tests by default'
+desc "Run all tests by default"
 task :default => %w(test test:isolated)
 
 %w(test test:isolated package gem).each do |task_name|
@@ -24,7 +24,7 @@ task :default => %w(test test:isolated)
       system(%(cd #{project} && #{$0} #{task_name} --trace)) || errors << project
     end
     if task_name =~ /test/
-      system(%(cd actioncable && env FAYE=1 #{$0} #{task_name} --trace)) || errors << 'actioncable-faye'
+      system(%(cd actioncable && env FAYE=1 #{$0} #{task_name} --trace)) || errors << "actioncable-faye"
     end
     fail("Errors in #{errors.join(', ')}") unless errors.empty?
   end
@@ -43,13 +43,13 @@ desc "Install gems for all projects."
 task :install => "all:install"
 
 desc "Generate documentation for the Rails framework"
-if ENV['EDGE']
-  Rails::API::EdgeTask.new('rdoc')
+if ENV["EDGE"]
+  Rails::API::EdgeTask.new("rdoc")
 else
-  Rails::API::StableTask.new('rdoc')
+  Rails::API::StableTask.new("rdoc")
 end
 
-desc 'Bump all versions to match RAILS_VERSION'
+desc "Bump all versions to match RAILS_VERSION"
 task :update_versions => "all:update_versions"
 
 # We have a webhook configured in GitHub that gets invoked after pushes.
@@ -61,10 +61,10 @@ task :update_versions => "all:update_versions"
 #   * if there's a new stable tag, generates and publishes stable docs
 #
 # Everything is automated and you do NOT need to run this task normally.
-desc 'Publishes docs, run this AFTER a new stable tag has been pushed'
+desc "Publishes docs, run this AFTER a new stable tag has been pushed"
 task :publish_docs do
-  Net::HTTP.new('api.rubyonrails.org', 8080).start do |http|
-    request  = Net::HTTP::Post.new('/rails-master-hook')
+  Net::HTTP.new("api.rubyonrails.org", 8080).start do |http|
+    request  = Net::HTTP::Post.new("/rails-master-hook")
     response = http.request(request)
     puts response.body
   end
diff --git a/actioncable/Rakefile b/actioncable/Rakefile
index a72142deb5..4419eb1738 100644
--- a/actioncable/Rakefile
+++ b/actioncable/Rakefile
@@ -1,7 +1,7 @@
-require 'rake/testtask'
-require 'pathname'
-require 'action_cable'
-require 'blade'
+require "rake/testtask"
+require "pathname"
+require "action_cable"
+require "blade"
 
 dir = File.dirname(__FILE__)
 
@@ -20,12 +20,12 @@ end
 namespace :test do
   task :isolated do
     Dir.glob("test/**/*_test.rb").all? do |file|
-      sh(Gem.ruby, '-w', '-Ilib:test', file)
+      sh(Gem.ruby, "-w", "-Ilib:test", file)
     end or raise "Failures"
   end
 
   task :integration do
-    if ENV['CI']
+    if ENV["CI"]
       Blade.start(interface: :ci)
     else
       Blade.start(interface: :runner)
diff --git a/actionmailer/Rakefile b/actionmailer/Rakefile
index 416c9ee33a..059d98fb28 100644
--- a/actionmailer/Rakefile
+++ b/actionmailer/Rakefile
@@ -1,4 +1,4 @@
-require 'rake/testtask'
+require "rake/testtask"
 
 desc "Default Task"
 task default: [ :test ]
@@ -8,7 +8,7 @@ task :package
 # Run the unit tests
 Rake::TestTask.new { |t|
   t.libs << "test"
-  t.pattern = 'test/**/*_test.rb'
+  t.pattern = "test/**/*_test.rb"
   t.warning = true
   t.verbose = true
   t.ruby_opts = ["--dev"] if defined?(JRUBY_VERSION)
@@ -17,7 +17,7 @@ Rake::TestTask.new { |t|
 namespace :test do
   task :isolated do
     Dir.glob("test/**/*_test.rb").all? do |file|
-      sh(Gem.ruby, '-w', '-Ilib:test', file)
+      sh(Gem.ruby, "-w", "-Ilib:test", file)
     end or raise "Failures"
   end
 end
diff --git a/actionpack/Rakefile b/actionpack/Rakefile
index 4a05c067a9..b8e62bf428 100644
--- a/actionpack/Rakefile
+++ b/actionpack/Rakefile
@@ -1,6 +1,6 @@
-require 'rake/testtask'
+require "rake/testtask"
 
-test_files = Dir.glob('test/**/*_test.rb')
+test_files = Dir.glob("test/**/*_test.rb")
 
 desc "Default Task"
 task :default => :test
@@ -9,7 +9,7 @@ task :package
 
 # Run the unit tests
 Rake::TestTask.new do |t|
-  t.libs << 'test'
+  t.libs << "test"
   t.test_files = test_files
 
   t.warning = true
@@ -20,19 +20,19 @@ end
 namespace :test do
   task :isolated do
     test_files.all? do |file|
-      sh(Gem.ruby, '-w', '-Ilib:test', file)
+      sh(Gem.ruby, "-w", "-Ilib:test", file)
     end or raise "Failures"
   end
 end
 
 task :lines do
-  load File.expand_path('..', File.dirname(__FILE__)) + '/tools/line_statistics'
+  load File.expand_path("..", File.dirname(__FILE__)) + "/tools/line_statistics"
   files = FileList["lib/**/*.rb"]
   CodeTools::LineStatistics.new(files).print_loc
 end
 
-rule '.rb' => '.y' do |t|
+rule ".rb" => ".y" do |t|
   sh "racc -l -o #{t.name} #{t.source}"
 end
 
-task compile: 'lib/action_dispatch/journey/parser.rb'
+task compile: "lib/action_dispatch/journey/parser.rb"
diff --git a/actionview/Rakefile b/actionview/Rakefile
index f0f9bda3e4..936620e6e6 100644
--- a/actionview/Rakefile
+++ b/actionview/Rakefile
@@ -1,4 +1,4 @@
-require 'rake/testtask'
+require "rake/testtask"
 
 desc "Default Task"
 task :default => :test
@@ -13,31 +13,31 @@ task :test => ["test:template", "test:integration:action_pack", "test:integratio
 namespace :test do
   task :isolated do
     Dir.glob("test/{actionpack,activerecord,template}/**/*_test.rb").all? do |file|
-      sh(Gem.ruby, '-w', '-Ilib:test', file)
+      sh(Gem.ruby, "-w", "-Ilib:test", file)
     end or raise "Failures"
   end
 
   Rake::TestTask.new(:template) do |t|
-    t.libs << 'test'
-    t.test_files = Dir.glob('test/template/**/*_test.rb')
+    t.libs << "test"
+    t.test_files = Dir.glob("test/template/**/*_test.rb")
     t.warning = true
     t.verbose = true
     t.ruby_opts = ["--dev"] if defined?(JRUBY_VERSION)
   end
 
   namespace :integration do
-    desc 'ActiveRecord Integration Tests'
+    desc "ActiveRecord Integration Tests"
     Rake::TestTask.new(:active_record) do |t|
-      t.libs << 'test'
+      t.libs << "test"
       t.test_files = Dir.glob("test/activerecord/*_test.rb")
       t.warning = true
       t.verbose = true
       t.ruby_opts = ["--dev"] if defined?(JRUBY_VERSION)
     end
 
-    desc 'ActionPack Integration Tests'
+    desc "ActionPack Integration Tests"
     Rake::TestTask.new(:action_pack) do |t|
-      t.libs << 'test'
+      t.libs << "test"
       t.test_files = Dir.glob("test/actionpack/**/*_test.rb")
       t.warning = true
       t.verbose = true
@@ -47,7 +47,7 @@ namespace :test do
 end
 
 task :lines do
-  load File.expand_path('..', File.dirname(__FILE__)) + '/tools/line_statistics'
+  load File.expand_path("..", File.dirname(__FILE__)) + "/tools/line_statistics"
   files = FileList["lib/**/*.rb"]
   CodeTools::LineStatistics.new(files).print_loc
 end
diff --git a/activejob/Rakefile b/activejob/Rakefile
index e47f17b740..da153c8a49 100644
--- a/activejob/Rakefile
+++ b/activejob/Rakefile
@@ -1,41 +1,41 @@
-require 'rake/testtask'
+require "rake/testtask"
 
 #TODO: add qu back to the list after it support Rails 5.1
 ACTIVEJOB_ADAPTERS = %w(async inline delayed_job que queue_classic resque sidekiq sneakers sucker_punch backburner test)
 ACTIVEJOB_ADAPTERS -= %w(queue_classic) if defined?(JRUBY_VERSION)
 
 task default: :test
-task test: 'test:default'
+task test: "test:default"
 
 task :package
 
 namespace :test do
-  desc 'Run all adapter tests'
+  desc "Run all adapter tests"
   task :default do
     run_without_aborting ACTIVEJOB_ADAPTERS.map { |a| "test:#{a}" }
   end
 
-  desc 'Run all adapter tests in isolation'
+  desc "Run all adapter tests in isolation"
   task :isolated do
     run_without_aborting ACTIVEJOB_ADAPTERS.map { |a| "test:isolated:#{a}" }
   end
 
-  desc 'Run integration tests for all adapters'
+  desc "Run integration tests for all adapters"
   task :integration do
-    run_without_aborting (ACTIVEJOB_ADAPTERS - ['test']).map { |a| "test:integration:#{a}" }
+    run_without_aborting (ACTIVEJOB_ADAPTERS - ["test"]).map { |a| "test:integration:#{a}" }
   end
 
-  task 'env:integration' do
-    ENV['AJ_INTEGRATION_TESTS'] = "1"
+  task "env:integration" do
+    ENV["AJ_INTEGRATION_TESTS"] = "1"
   end
 
   ACTIVEJOB_ADAPTERS.each do |adapter|
-    task("env:#{adapter}") { ENV['AJ_ADAPTER'] = adapter }
+    task("env:#{adapter}") { ENV["AJ_ADAPTER"] = adapter }
 
     Rake::TestTask.new(adapter => "test:env:#{adapter}") do |t|
       t.description = "Run adapter tests for #{adapter}"
-      t.libs << 'test'
-      t.test_files = FileList['test/cases/**/*_test.rb']
+      t.libs << "test"
+      t.test_files = FileList["test/cases/**/*_test.rb"]
       t.verbose = true
       t.warning = false
       t.ruby_opts = ["--dev"] if defined?(JRUBY_VERSION)
@@ -45,16 +45,16 @@ namespace :test do
       task adapter => "test:env:#{adapter}" do
         dir = File.dirname(__FILE__)
         Dir.glob("#{dir}/test/cases/**/*_test.rb").all? do |file|
-          sh(Gem.ruby, '-w', "-I#{dir}/lib", "-I#{dir}/test", file)
-        end or raise 'Failures'
+          sh(Gem.ruby, "-w", "-I#{dir}/lib", "-I#{dir}/test", file)
+        end or raise "Failures"
       end
     end
 
     namespace :integration do
-      Rake::TestTask.new(adapter => ["test:env:#{adapter}", 'test:env:integration']) do |t|
+      Rake::TestTask.new(adapter => ["test:env:#{adapter}", "test:env:integration"]) do |t|
         t.description = "Run integration tests for #{adapter}"
-        t.libs << 'test'
-        t.test_files = FileList['test/integration/**/*_test.rb']
+        t.libs << "test"
+        t.test_files = FileList["test/integration/**/*_test.rb"]
         t.verbose = true
         t.warning = false
         t.ruby_opts = ["--dev"] if defined?(JRUBY_VERSION)
diff --git a/activemodel/Rakefile b/activemodel/Rakefile
index 036815a987..d94f857614 100644
--- a/activemodel/Rakefile
+++ b/activemodel/Rakefile
@@ -1,4 +1,4 @@
-require 'rake/testtask'
+require "rake/testtask"
 
 dir = File.dirname(__FILE__)
 
@@ -17,7 +17,7 @@ end
 namespace :test do
   task :isolated do
     Dir.glob("#{dir}/test/**/*_test.rb").all? do |file|
-      sh(Gem.ruby, '-w', "-I#{dir}/lib", "-I#{dir}/test", file)
+      sh(Gem.ruby, "-w", "-I#{dir}/lib", "-I#{dir}/test", file)
     end or raise "Failures"
   end
 end
diff --git a/activerecord/Rakefile b/activerecord/Rakefile
index 8fbea61335..5bf1c843af 100644
--- a/activerecord/Rakefile
+++ b/activerecord/Rakefile
@@ -1,4 +1,4 @@
-require 'rake/testtask'
+require "rake/testtask"
 
 require File.expand_path(File.dirname(__FILE__)) + "/test/config"
 require File.expand_path(File.dirname(__FILE__)) + "/test/support/config"
@@ -17,12 +17,12 @@ def run_without_aborting(*tasks)
   abort "Errors running #{errors.join(', ')}" if errors.any?
 end
 
-desc 'Run mysql2, sqlite, and postgresql tests by default'
+desc "Run mysql2, sqlite, and postgresql tests by default"
 task :default => :test
 
 task :package
 
-desc 'Run mysql2, sqlite, and postgresql tests'
+desc "Run mysql2, sqlite, and postgresql tests"
 task :test do
   tasks = defined?(JRUBY_VERSION) ?
     %w(test_jdbcmysql test_jdbcsqlite3 test_jdbcpostgresql) :
@@ -39,19 +39,19 @@ namespace :test do
   end
 end
 
-desc 'Build MySQL and PostgreSQL test databases'
+desc "Build MySQL and PostgreSQL test databases"
 namespace :db do
-  task :create => ['db:mysql:build', 'db:postgresql:build']
-  task :drop => ['db:mysql:drop', 'db:postgresql:drop']
+  task :create => ["db:mysql:build", "db:postgresql:build"]
+  task :drop => ["db:mysql:drop", "db:postgresql:drop"]
 end
 
 %w( mysql2 postgresql sqlite3 sqlite3_mem db2 oracle jdbcmysql jdbcpostgresql jdbcsqlite3 jdbcderby jdbch2 jdbchsqldb ).each do |adapter|
   namespace :test do
     Rake::TestTask.new(adapter => "#{adapter}:env") { |t|
-      adapter_short = adapter == 'db2' ? adapter : adapter[/^[a-z0-9]+/]
-      t.libs << 'test'
+      adapter_short = adapter == "db2" ? adapter : adapter[/^[a-z0-9]+/]
+      t.libs << "test"
       t.test_files = (Dir.glob( "test/cases/**/*_test.rb" ).reject {
-        |x| x.include?('/adapters/')
+        |x| x.include?("/adapters/")
       } + Dir.glob("test/cases/adapters/#{adapter_short}/**/*_test.rb"))
 
       t.warning = true
@@ -61,12 +61,12 @@ end
 
     namespace :isolated do
       task adapter => "#{adapter}:env" do
-        adapter_short = adapter == 'db2' ? adapter : adapter[/^[a-z0-9]+/]
+        adapter_short = adapter == "db2" ? adapter : adapter[/^[a-z0-9]+/]
         puts [adapter, adapter_short].inspect
         (Dir["test/cases/**/*_test.rb"].reject {
-          |x| x.include?('/adapters/')
+          |x| x.include?("/adapters/")
         } + Dir["test/cases/adapters/#{adapter_short}/**/*_test.rb"]).all? do |file|
-          sh(Gem.ruby, '-w' ,"-Itest", file)
+          sh(Gem.ruby, "-w" ,"-Itest", file)
         end or raise "Failures"
       end
     end
@@ -77,7 +77,7 @@ end
     task :isolated_test => "isolated_test_#{adapter}"
 
     # Set the connection environment for the adapter
-    task(:env) { ENV['ARCONN'] = adapter }
+    task(:env) { ENV["ARCONN"] = adapter }
   end
 
   # Make sure the adapter test evaluates the env setting task
@@ -87,30 +87,30 @@ end
 
 namespace :db do
   namespace :mysql do
-    desc 'Build the MySQL test databases'
+    desc "Build the MySQL test databases"
     task :build do
-      config = ARTest.config['connections']['mysql2']
-      %x( mysql --user=#{config['arunit']['username']} --password=#{config['arunit']['password']} -e "create DATABASE #{config['arunit']['database']} DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_unicode_ci ")
-      %x( mysql --user=#{config['arunit2']['username']} --password=#{config['arunit2']['password']} -e "create DATABASE #{config['arunit2']['database']} DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_unicode_ci ")
+      config = ARTest.config["connections"]["mysql2"]
+      %x( mysql --user=#{config["arunit"]["username"]} --password=#{config["arunit"]["password"]} -e "create DATABASE #{config["arunit"]["database"]} DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_unicode_ci ")
+      %x( mysql --user=#{config["arunit2"]["username"]} --password=#{config["arunit2"]["password"]} -e "create DATABASE #{config["arunit2"]["database"]} DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_unicode_ci ")
     end
 
-    desc 'Drop the MySQL test databases'
+    desc "Drop the MySQL test databases"
     task :drop do
-      config = ARTest.config['connections']['mysql2']
-      %x( mysqladmin --user=#{config['arunit']['username']} --password=#{config['arunit']['password']} -f drop #{config['arunit']['database']} )
-      %x( mysqladmin --user=#{config['arunit2']['username']} --password=#{config['arunit2']['password']} -f drop #{config['arunit2']['database']} )
+      config = ARTest.config["connections"]["mysql2"]
+      %x( mysqladmin --user=#{config["arunit"]["username"]} --password=#{config["arunit"]["password"]} -f drop #{config["arunit"]["database"]} )
+      %x( mysqladmin --user=#{config["arunit2"]["username"]} --password=#{config["arunit2"]["password"]} -f drop #{config["arunit2"]["database"]} )
     end
 
-    desc 'Rebuild the MySQL test databases'
+    desc "Rebuild the MySQL test databases"
     task :rebuild => [:drop, :build]
   end
 
   namespace :postgresql do
-    desc 'Build the PostgreSQL test databases'
+    desc "Build the PostgreSQL test databases"
     task :build do
-      config = ARTest.config['connections']['postgresql']
-      %x( createdb -E UTF8 -T template0 #{config['arunit']['database']} )
-      %x( createdb -E UTF8 -T template0 #{config['arunit2']['database']} )
+      config = ARTest.config["connections"]["postgresql"]
+      %x( createdb -E UTF8 -T template0 #{config["arunit"]["database"]} )
+      %x( createdb -E UTF8 -T template0 #{config["arunit2"]["database"]} )
 
       # prepare hstore
       if %x( createdb --version ).strip.gsub(/(.*)(\d\.\d\.\d)$/, "\\2") < "9.1.0"
@@ -118,28 +118,28 @@ namespace :db do
       end
     end
 
-    desc 'Drop the PostgreSQL test databases'
+    desc "Drop the PostgreSQL test databases"
     task :drop do
-      config = ARTest.config['connections']['postgresql']
-      %x( dropdb #{config['arunit']['database']} )
-      %x( dropdb #{config['arunit2']['database']} )
+      config = ARTest.config["connections"]["postgresql"]
+      %x( dropdb #{config["arunit"]["database"]} )
+      %x( dropdb #{config["arunit2"]["database"]} )
     end
 
-    desc 'Rebuild the PostgreSQL test databases'
+    desc "Rebuild the PostgreSQL test databases"
     task :rebuild => [:drop, :build]
   end
 end
 
-task :build_mysql_databases => 'db:mysql:build'
-task :drop_mysql_databases => 'db:mysql:drop'
-task :rebuild_mysql_databases => 'db:mysql:rebuild'
+task :build_mysql_databases => "db:mysql:build"
+task :drop_mysql_databases => "db:mysql:drop"
+task :rebuild_mysql_databases => "db:mysql:rebuild"
 
-task :build_postgresql_databases => 'db:postgresql:build'
-task :drop_postgresql_databases => 'db:postgresql:drop'
-task :rebuild_postgresql_databases => 'db:postgresql:rebuild'
+task :build_postgresql_databases => "db:postgresql:build"
+task :drop_postgresql_databases => "db:postgresql:drop"
+task :rebuild_postgresql_databases => "db:postgresql:rebuild"
 
 task :lines do
-  load File.expand_path('..', File.dirname(__FILE__)) + '/tools/line_statistics'
+  load File.expand_path("..", File.dirname(__FILE__)) + "/tools/line_statistics"
   files = FileList["lib/active_record/**/*.rb"]
   CodeTools::LineStatistics.new(files).print_loc
 end
diff --git a/activerecord/bin/test b/activerecord/bin/test
index 7417b068bf..822e303ad8 100755
--- a/activerecord/bin/test
+++ b/activerecord/bin/test
@@ -14,6 +14,6 @@ module Minitest
   end
 end
 
-Minitest.extensions.unshift 'active_record'
+Minitest.extensions.unshift "active_record"
 
 exit Minitest.run(ARGV)
diff --git a/activerecord/examples/performance.rb b/activerecord/examples/performance.rb
index c3c46c19c5..cb9ee58f59 100644
--- a/activerecord/examples/performance.rb
+++ b/activerecord/examples/performance.rb
@@ -1,10 +1,10 @@
 require "active_record"
-require 'benchmark/ips'
+require "benchmark/ips"
 
-TIME    = (ENV['BENCHMARK_TIME'] || 20).to_i
-RECORDS = (ENV['BENCHMARK_RECORDS'] || TIME*1000).to_i
+TIME    = (ENV["BENCHMARK_TIME"] || 20).to_i
+RECORDS = (ENV["BENCHMARK_RECORDS"] || TIME*1000).to_i
 
-conn = { adapter: 'sqlite3', database: ':memory:' }
+conn = { adapter: "sqlite3", database: ":memory:" }
 
 ActiveRecord::Base.establish_connection(conn)
 
@@ -44,7 +44,7 @@ end
 
 def progress_bar(int); print "." if (int%100).zero? ; end
 
-puts 'Generating data...'
+puts "Generating data..."
 
 module ActiveRecord
   class Faker
@@ -57,11 +57,11 @@ module ActiveRecord
      Praesent varius tincidunt commodo}.split
 
     def self.name
-      LOREM.grep(/^\w*$/).sort_by { rand }.first(2).join ' '
+      LOREM.grep(/^\w*$/).sort_by { rand }.first(2).join " "
     end
 
     def self.email
-      LOREM.grep(/^\w*$/).sort_by { rand }.first(2).join('@') + ".com"
+      LOREM.grep(/^\w*$/).sort_by { rand }.first(2).join("@") + ".com"
     end
   end
 end
@@ -72,7 +72,7 @@ end
 
 # Using the same paragraph for all exhibits because it is very slow
 # to generate unique paragraphs for all exhibits.
-notes = ActiveRecord::Faker::LOREM.join ' '
+notes = ActiveRecord::Faker::LOREM.join " "
 today = Date.today
 
 puts "Inserting #{RECORDS} users and exhibits..."
@@ -95,9 +95,9 @@ puts "Done!\n"
 
 Benchmark.ips(TIME) do |x|
   ar_obj       = Exhibit.find(1)
-  attrs        = { name: 'sam' }
-  attrs_first  = { name: 'sam' }
-  attrs_second = { name: 'tom' }
+  attrs        = { name: "sam" }
+  attrs_first  = { name: "sam" }
+  attrs_second = { name: "tom" }
   exhibit      = {
     name: ActiveRecord::Faker.name,
     notes: notes,
@@ -108,19 +108,19 @@ Benchmark.ips(TIME) do |x|
     ar_obj.id
   end
 
-  x.report 'Model.new (instantiation)' do
+  x.report "Model.new (instantiation)" do
     Exhibit.new
   end
 
-  x.report 'Model.new (setting attributes)' do
+  x.report "Model.new (setting attributes)" do
     Exhibit.new(attrs)
   end
 
-  x.report 'Model.first' do
+  x.report "Model.first" do
     Exhibit.first.look
   end
 
-  x.report 'Model.take' do 
+  x.report "Model.take" do 
     Exhibit.take
   end
   
@@ -140,36 +140,36 @@ Benchmark.ips(TIME) do |x|
     Exhibit.look Exhibit.limit(10000)
   end
 
-  x.report 'Model.named_scope' do
+  x.report "Model.named_scope" do
     Exhibit.limit(10).with_name.with_notes
   end
 
-  x.report 'Model.create' do
+  x.report "Model.create" do
     Exhibit.create(exhibit)
   end
 
-  x.report 'Resource#attributes=' do
+  x.report "Resource#attributes=" do
     e = Exhibit.new(attrs_first)
     e.attributes = attrs_second
   end
 
-  x.report 'Resource#update' do
-    Exhibit.first.update(name: 'bob')
+  x.report "Resource#update" do
+    Exhibit.first.update(name: "bob")
   end
 
-  x.report 'Resource#destroy' do
+  x.report "Resource#destroy" do
     Exhibit.first.destroy
   end
 
-  x.report 'Model.transaction' do
+  x.report "Model.transaction" do
     Exhibit.transaction { Exhibit.new }
   end
 
-  x.report 'Model.find(id)' do
+  x.report "Model.find(id)" do
     User.find(1)
   end
 
-  x.report 'Model.find_by_sql' do
+  x.report "Model.find_by_sql" do
     Exhibit.find_by_sql("SELECT * FROM exhibits WHERE id = #{(rand * 1000 + 1).to_i}").first
   end
 
diff --git a/activerecord/examples/simple.rb b/activerecord/examples/simple.rb
index 5a041e8417..c3648fee48 100644
--- a/activerecord/examples/simple.rb
+++ b/activerecord/examples/simple.rb
@@ -1,13 +1,13 @@
-require 'active_record'
+require "active_record"
 
 class Person < ActiveRecord::Base
-  establish_connection adapter: 'sqlite3', database: 'foobar.db'
+  establish_connection adapter: "sqlite3", database: "foobar.db"
   connection.create_table table_name, force: true do |t|
     t.string :name
   end
 end
 
-bob = Person.create!(name: 'bob')
+bob = Person.create!(name: "bob")
 puts Person.all.inspect
 bob.destroy
 puts Person.all.inspect
diff --git a/activesupport/Rakefile b/activesupport/Rakefile
index 7b56e36abf..de3467529d 100644
--- a/activesupport/Rakefile
+++ b/activesupport/Rakefile
@@ -1,12 +1,12 @@
-require 'rake/testtask'
+require "rake/testtask"
 
 task :default => :test
 
 task :package
 
 Rake::TestTask.new do |t|
-  t.libs << 'test'
-  t.pattern = 'test/**/*_test.rb'
+  t.libs << "test"
+  t.pattern = "test/**/*_test.rb"
   t.warning = true
   t.verbose = true
   t.ruby_opts = ["--dev"] if defined?(JRUBY_VERSION)
@@ -15,7 +15,7 @@ end
 namespace :test do
   task :isolated do
     Dir.glob("test/**/*_test.rb").all? do |file|
-      sh(Gem.ruby, '-w', '-Ilib:test', file)
+      sh(Gem.ruby, "-w", "-Ilib:test", file)
     end or raise "Failures"
   end
 end
diff --git a/activesupport/bin/generate_tables b/activesupport/bin/generate_tables
index 2193533588..c5ed991d94 100755
--- a/activesupport/bin/generate_tables
+++ b/activesupport/bin/generate_tables
@@ -1,13 +1,13 @@
 #!/usr/bin/env ruby
 
 begin
-  $:.unshift(File.expand_path(File.dirname(__FILE__) + '/../lib'))
-  require 'active_support'
+  $:.unshift(File.expand_path(File.dirname(__FILE__) + "/../lib"))
+  require "active_support"
 rescue IOError
 end
 
-require 'open-uri'
-require 'tmpdir'
+require "open-uri"
+require "tmpdir"
 
 module ActiveSupport
   module Multibyte
@@ -20,10 +20,10 @@ module ActiveSupport
       class DatabaseGenerator
         BASE_URI = "http://www.unicode.org/Public/#{UNICODE_VERSION}/ucd/"
         SOURCES = {
-          :codepoints => BASE_URI + 'UnicodeData.txt',
-          :composition_exclusion => BASE_URI + 'CompositionExclusions.txt',
-          :grapheme_break_property => BASE_URI + 'auxiliary/GraphemeBreakProperty.txt',
-          :cp1252 => 'http://unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WINDOWS/CP1252.TXT'
+          :codepoints => BASE_URI + "UnicodeData.txt",
+          :composition_exclusion => BASE_URI + "CompositionExclusions.txt",
+          :grapheme_break_property => BASE_URI + "auxiliary/GraphemeBreakProperty.txt",
+          :cp1252 => "http://unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WINDOWS/CP1252.TXT"
         }
 
         def initialize
@@ -52,9 +52,9 @@ module ActiveSupport
           codepoint.code              = $1.hex
           codepoint.combining_class   = Integer($4)
           codepoint.decomp_type       = $7
-          codepoint.decomp_mapping    = ($8=='') ? nil : $8.split.collect(&:hex)
-          codepoint.uppercase_mapping = ($16=='') ? 0 : $16.hex
-          codepoint.lowercase_mapping = ($17=='') ? 0 : $17.hex
+          codepoint.decomp_mapping    = ($8=="") ? nil : $8.split.collect(&:hex)
+          codepoint.uppercase_mapping = ($16=="") ? 0 : $16.hex
+          codepoint.lowercase_mapping = ($17=="") ? 0 : $17.hex
           @ucd.codepoints[codepoint.code] = codepoint
         end
 
@@ -62,8 +62,8 @@ module ActiveSupport
           if line =~ /^([0-9A-F.]+)\s*;\s*([\w]+)\s*#/
             type = $2.downcase.intern
             @ucd.boundary[type] ||= []
-            if $1.include? '..'
-              parts = $1.split '..'
+            if $1.include? ".."
+              parts = $1.split ".."
               @ucd.boundary[type] << (parts[0].hex..parts[1].hex)
             else
               @ucd.boundary[type] << $1.hex
@@ -105,7 +105,7 @@ module ActiveSupport
             filename =  File.join(Dir.tmpdir, "#{url.split('/').last}")
             unless File.exist?(filename)
               $stderr.puts "Downloading #{url.split('/').last}"
-              File.open(filename, 'wb') do |target|
+              File.open(filename, "wb") do |target|
                 open(url) do |source|
                   source.each_line { |line| target.write line }
                 end
@@ -120,7 +120,7 @@ module ActiveSupport
         end
 
         def dump_to(filename)
-          File.open(filename, 'wb') do |f|
+          File.open(filename, "wb") do |f|
             f.write Marshal.dump([@ucd.codepoints, @ucd.composition_exclusion, @ucd.composition_map, @ucd.boundary, @ucd.cp1252])
           end
         end
diff --git a/railties/Rakefile b/railties/Rakefile
index db23bbabaa..edc405f605 100644
--- a/railties/Rakefile
+++ b/railties/Rakefile
@@ -1,11 +1,11 @@
-require 'rake/testtask'
+require "rake/testtask"
 
 task :default => :test
 
 task :package
 
 desc "Run all unit tests"
-task :test => 'test:isolated'
+task :test => "test:isolated"
 
 namespace :test do
   task :isolated do
@@ -14,8 +14,8 @@ namespace :test do
     Dir[*test_files].each do |file|
       next true if file.include?("fixtures")
       dash_i = [
-        'test',
-        'lib',
+        "test",
+        "lib",
         "#{File.dirname(__FILE__)}/../activesupport/lib",
         "#{File.dirname(__FILE__)}/../actionpack/lib",
         "#{File.dirname(__FILE__)}/../activemodel/lib"
@@ -25,9 +25,9 @@ namespace :test do
   end
 end
 
-Rake::TestTask.new('test:regular') do |t|
-  t.libs << 'test' << "#{File.dirname(__FILE__)}/../activesupport/lib"
-  t.pattern = 'test/**/*_test.rb'
+Rake::TestTask.new("test:regular") do |t|
+  t.libs << "test" << "#{File.dirname(__FILE__)}/../activesupport/lib"
+  t.pattern = "test/**/*_test.rb"
   t.warning = false
   t.verbose = true
   t.ruby_opts = ["--dev"] if defined?(JRUBY_VERSION)
diff --git a/railties/exe/rails b/railties/exe/rails
index 82c17cabce..7e791c1f99 100755
--- a/railties/exe/rails
+++ b/railties/exe/rails
@@ -1,9 +1,9 @@
 #!/usr/bin/env ruby
 
-git_path = File.expand_path('../../../.git', __FILE__)
+git_path = File.expand_path("../../../.git", __FILE__)
 
 if File.exist?(git_path)
-  railties_path = File.expand_path('../../lib', __FILE__)
+  railties_path = File.expand_path("../../lib", __FILE__)
   $:.unshift(railties_path)
 end
 require "rails/cli"