Rubocop fixes

gemfiles/rails_3.2.gemfile

@@ -1,21 +1,23 @@
+# frozen_string_literal: true
+
 # This file was generated by Appraisal
 
-source "http://rubygems.org"
+source 'http://rubygems.org'
 
-gem "activerecord", "~> 3.2.22"
-gem "activesupport", "~> 3.2.22"
-gem "ancestry"
-gem "railties", "~> 3.2.22"
+gem 'activerecord', '~> 3.2.22'
+gem 'activesupport', '~> 3.2.22'
+gem 'ancestry'
+gem 'railties', '~> 3.2.22'
 
 group :development do
-  gem "appraisal"
-  gem "coveralls_reborn", require: false
-  gem "jeweler"
-  gem "pg"
-  gem "pry"
-  gem "rspec"
-  gem "rubocop", require: false
-  gem "sqlite3", "~> 1.3.6"
-  gem "timecop"
-  gem "yard"
+  gem 'appraisal'
+  gem 'coveralls_reborn', require: false
+  gem 'jeweler'
+  gem 'pg'
+  gem 'pry'
+  gem 'rspec'
+  gem 'rubocop', require: false
+  gem 'sqlite3', '~> 1.3.6'
+  gem 'timecop'
+  gem 'yard'
 end

gemfiles/rails_4.2.gemfile

@@ -1,22 +1,24 @@
+# frozen_string_literal: true
+
 # This file was generated by Appraisal
 
-source "http://rubygems.org"
+source 'http://rubygems.org'
 
-gem "activerecord", "~> 4.2"
-gem "activesupport", "~> 4.2"
-gem "ancestry"
-gem "railties", "~> 4.2"
-gem "rdoc", "6.2.0"
+gem 'activerecord', '~> 4.2'
+gem 'activesupport', '~> 4.2'
+gem 'ancestry'
+gem 'railties', '~> 4.2'
+gem 'rdoc', '6.2.0'
 
 group :development do
-  gem "appraisal"
-  gem "coveralls_reborn", require: false
-  gem "jeweler"
-  gem "pg"
-  gem "pry"
-  gem "rspec"
-  gem "rubocop", require: false
-  gem "sqlite3", "~> 1.3.6"
-  gem "timecop"
-  gem "yard"
+  gem 'appraisal'
+  gem 'coveralls_reborn', require: false
+  gem 'jeweler'
+  gem 'pg'
+  gem 'pry'
+  gem 'rspec'
+  gem 'rubocop', require: false
+  gem 'sqlite3', '~> 1.3.6'
+  gem 'timecop'
+  gem 'yard'
 end

gemfiles/rails_5.2.gemfile

@@ -1,21 +1,23 @@
+# frozen_string_literal: true
+
 # This file was generated by Appraisal
 
-source "http://rubygems.org"
+source 'http://rubygems.org'
 
-gem "activerecord", "~> 5.2.0"
-gem "activesupport", "~> 5.2.0"
-gem "ancestry"
-gem "railties", "~> 5.2.0"
+gem 'activerecord', '~> 5.2.0'
+gem 'activesupport', '~> 5.2.0'
+gem 'ancestry'
+gem 'railties', '~> 5.2.0'
 
 group :development do
-  gem "appraisal"
-  gem "coveralls_reborn", require: false
-  gem "jeweler"
-  gem "pg"
-  gem "pry"
-  gem "rspec"
-  gem "rubocop", require: false
-  gem "sqlite3", "~> 1.3.6"
-  gem "timecop"
-  gem "yard"
+  gem 'appraisal'
+  gem 'coveralls_reborn', require: false
+  gem 'jeweler'
+  gem 'pg'
+  gem 'pry'
+  gem 'rspec'
+  gem 'rubocop', require: false
+  gem 'sqlite3', '~> 1.3.6'
+  gem 'timecop'
+  gem 'yard'
 end

gemfiles/rails_6.0.gemfile

@@ -1,21 +1,23 @@
+# frozen_string_literal: true
+
 # This file was generated by Appraisal
 
-source "http://rubygems.org"
+source 'http://rubygems.org'
 
-gem "activerecord", "~> 6"
-gem "activesupport", "~> 6"
-gem "ancestry"
-gem "railties", "~> 6"
+gem 'activerecord', '~> 6'
+gem 'activesupport', '~> 6'
+gem 'ancestry'
+gem 'railties', '~> 6'
 
 group :development do
-  gem "appraisal"
-  gem "coveralls_reborn", require: false
-  gem "jeweler"
-  gem "pg"
-  gem "pry"
-  gem "rspec"
-  gem "rubocop", require: false
-  gem "sqlite3", "~> 1.4.0"
-  gem "timecop"
-  gem "yard"
+  gem 'appraisal'
+  gem 'coveralls_reborn', require: false
+  gem 'jeweler'
+  gem 'pg'
+  gem 'pry'
+  gem 'rspec'
+  gem 'rubocop', require: false
+  gem 'sqlite3', '~> 1.4.0'
+  gem 'timecop'
+  gem 'yard'
 end

gemfiles/rails_master.gemfile

@@ -1,21 +1,23 @@
+# frozen_string_literal: true
+
 # This file was generated by Appraisal
 
-source "http://rubygems.org"
+source 'http://rubygems.org'
 
-gem "activerecord", git: "https://github.com/rails/rails.git"
-gem "activesupport", git: "https://github.com/rails/rails.git"
-gem "ancestry"
-gem "railties", git: "https://github.com/rails/rails.git"
+gem 'activerecord', git: 'https://github.com/rails/rails.git'
+gem 'activesupport', git: 'https://github.com/rails/rails.git'
+gem 'ancestry'
+gem 'railties', git: 'https://github.com/rails/rails.git'
 
 group :development do
-  gem "appraisal"
-  gem "coveralls_reborn", require: false
-  gem "jeweler"
-  gem "pg", git: "https://github.com/ged/ruby-pg.git"
-  gem "pry"
-  gem "rspec"
-  gem "rubocop", require: false
-  gem "sqlite3"
-  gem "timecop"
-  gem "yard"
+  gem 'appraisal'
+  gem 'coveralls_reborn', require: false
+  gem 'jeweler'
+  gem 'pg', git: 'https://github.com/ged/ruby-pg.git'
+  gem 'pry'
+  gem 'rspec'
+  gem 'rubocop', require: false
+  gem 'sqlite3'
+  gem 'timecop'
+  gem 'yard'
 end