diff --git a/lib/factory_girl/fix_deprecations.rb b/lib/factory_girl/fix_deprecations.rb
index d12d0ee0..81223b09 100644
--- a/lib/factory_girl/fix_deprecations.rb
+++ b/lib/factory_girl/fix_deprecations.rb
@@ -83,7 +83,7 @@
     # Factory.define :user do |user|
     #   after(:create) { |instance| create_list(:post, 5, user: instance) }
     # end
-    %w(after_build after_create).each do |message|
+    %w[after_build after_create].each do |message|
       within_node type: 'block', caller: { type: 'send', message: message } do
         goto_node :caller do
           new_message = message.sub('after_', '')
@@ -158,7 +158,7 @@
     # Factory.create(:user) => create(:user)
     # Factory.build(:use) => build(:user)
     # Factory.attributes_for(:user) => attributes_for(:user)
-    %w(create build attributes_for).each do |message|
+    %w[create build attributes_for].each do |message|
       with_node type: 'send', receiver: 'Factory', message: message do
         replace_with "#{message}({{arguments}})"
       end
diff --git a/lib/factory_girl/use_short_syntax.rb b/lib/factory_girl/use_short_syntax.rb
index df7badb2..010d6cb6 100644
--- a/lib/factory_girl/use_short_syntax.rb
+++ b/lib/factory_girl/use_short_syntax.rb
@@ -64,7 +64,7 @@ class MiniTest::Rails::ActiveSupport::TestCase
 
   # insert include FactoryGirl::Syntax::Methods
   within_file 'test/test_helper.rb' do
-    %w(Test::Unit::TestCase ActiveSupport::TestCase MiniTest::Unit::TestCase MiniTest::Spec MiniTest::Rails::ActiveSupport::TestCase).each do |class_name|
+    %w[Test::Unit::TestCase ActiveSupport::TestCase MiniTest::Unit::TestCase MiniTest::Spec MiniTest::Rails::ActiveSupport::TestCase].each do |class_name|
       within_node type: 'class', name: class_name do
         unless_exist_node type: 'send', message: 'include', arguments: ['FactoryGirl::Syntax::Methods'] do
           insert 'include FactoryGirl::Syntax::Methods'
@@ -89,7 +89,7 @@ class MiniTest::Rails::ActiveSupport::TestCase
   # FactoryGirl.create_pair(...) => create_pair(...)
   # FactoryGirl.build_pair(...) => build_pair(...)
   within_files '{test,spec,features}/**/*.rb' do
-    %w(create build attributes_for build_stubbed create_list build_list create_pair build_pair).each do |message|
+    %w[create build attributes_for build_stubbed create_list build_list create_pair build_pair].each do |message|
       with_node type: 'send', receiver: 'FactoryGirl', message: message do
         replace_with "#{message}({{arguments}})"
       end
diff --git a/lib/rails/convert_mailers_2_3_to_3_0.rb b/lib/rails/convert_mailers_2_3_to_3_0.rb
index 8ccac10f..ab0e5571 100644
--- a/lib/rails/convert_mailers_2_3_to_3_0.rb
+++ b/lib/rails/convert_mailers_2_3_to_3_0.rb
@@ -63,7 +63,7 @@ def signup_notification(recipient)
           args[:to] = node.arguments.first.to_source
           remove
         end
-        %w(subject from cc bcc).each do |message|
+        %w[subject from cc bcc].each do |message|
           with_node type: 'send', receiver: nil, message: message do
             args[message.to_sym] = node.arguments.first.to_source
             remove
diff --git a/lib/rails/convert_models_2_3_to_3_0.rb b/lib/rails/convert_models_2_3_to_3_0.rb
index 3e25be3e..8e2761d5 100644
--- a/lib/rails/convert_models_2_3_to_3_0.rb
+++ b/lib/rails/convert_models_2_3_to_3_0.rb
@@ -127,7 +127,7 @@
     # default_scope :conditions => {:active => true}
     # =>
     # default_scope where(:active => true)
-    %w(named_scope default_scope).each do |message|
+    %w[named_scope default_scope].each do |message|
       within_node type: 'send', message: message, arguments: { last: { type: 'hash' } } do
         with_node type: 'hash' do
           if keys.any? { |key| node.has_key? key }
@@ -183,7 +183,7 @@
       end
     end
 
-    %w(first last).each do |message|
+    %w[first last].each do |message|
       # Post.first(:conditions => {:title => "test"})
       # =>
       # Post.where(:title => "test").first
@@ -195,7 +195,7 @@
       end
     end
 
-    %w(count average min max sum).each do |message|
+    %w[count average min max sum].each do |message|
       # Client.count("age", :conditions => {:active => true})
       # Client.average("orders_count", :conditions => {:active => true})
       # Client.min("age", :conditions => {:active => true})
@@ -282,14 +282,14 @@
     # =>
     # Post.where("title = \'test\'").destroy_all
     # Post.where("title = ?", title).destroy_all
-    %w(delete_all destroy_all).each do |message|
+    %w[delete_all destroy_all].each do |message|
       within_node type: 'send', message: message, arguments: { size: 1 } do
         conditions_node = node.arguments.first
         replace_with add_receiver_if_necessary("where(#{strip_brackets(conditions_node.to_source)}).#{message}")
       end
     end
 
-    %w(find_each find_in_batches).each do |message|
+    %w[find_each find_in_batches].each do |message|
       # Post.find_each(:conditions => {:title => "test"}, :batch_size => 100) do |post|
       # end
       # =>
@@ -314,7 +314,7 @@
       end
     end
 
-    %w(with_scope with_exclusive_scope).each do |message|
+    %w[with_scope with_exclusive_scope].each do |message|
       # with_scope(:find => {:conditions => {:active => true}}) { Post.first }
       # =>
       # with_scope(where(:active => true)) { Post.first }
diff --git a/lib/rails/convert_rails_test_request_methods_4_2_to_5_0.rb b/lib/rails/convert_rails_test_request_methods_4_2_to_5_0.rb
index 4fa44b48..00b31898 100644
--- a/lib/rails/convert_rails_test_request_methods_4_2_to_5_0.rb
+++ b/lib/rails/convert_rails_test_request_methods_4_2_to_5_0.rb
@@ -31,7 +31,7 @@
   # =>
   # get :show, params: { id: user.id }, flash: { notice: 'Welcome' }, session: { admin: user.admin? }.
   within_files '{test,spec}/{functional,controllers}/**/*.rb' do
-    %w(get post put patch delete).each do |message|
+    %w[get post put patch delete].each do |message|
       with_node type: 'send', message: message do
         next unless node.arguments.size > 1
         next unless node.arguments[1].type == :hash
@@ -50,7 +50,7 @@
   # =>
   # get '/posts/1', params: { user_id: user.id }, headers: { 'HTTP_AUTHORIZATION' => 'fake' }
   within_files '{test,spec}/{integration}/**/*.rb' do
-    %w(get post put patch delete).each do |message|
+    %w[get post put patch delete].each do |message|
       with_node type: 'send', message: message do
         next unless node.arguments.size > 1
         next if node.arguments[1].type == :hash && (node.arguments[1].has_key?(:params) || node.arguments[1].has_key?(:headers))
diff --git a/lib/rails/convert_routes_2_3_to_3_0.rb b/lib/rails/convert_routes_2_3_to_3_0.rb
index eedaa48c..4f6a95e5 100644
--- a/lib/rails/convert_routes_2_3_to_3_0.rb
+++ b/lib/rails/convert_routes_2_3_to_3_0.rb
@@ -169,7 +169,7 @@
     #   end
     #   map.resources :comments
     # end
-    %w(resource resources).each do |message|
+    %w[resource resources].each do |message|
       within_node type: 'block', caller: { type: 'send', receiver: { not: nil }, message: message } do
         block_argument = node.arguments.first.to_source
         hash_argument = node.caller.arguments.last
@@ -238,7 +238,7 @@
     #     post :activate
     #   edn
     # end
-    %w(resource resources).each do |message|
+    %w[resource resources].each do |message|
       with_node type: 'send', receiver: 'map', message: message do
         hash_argument = node.arguments.last
         if hash_argument.type == :hash && (hash_argument.has_key?(:collection) || hash_argument.has_key?(:member))
@@ -263,13 +263,13 @@
 
     # map.connect "/:controller/:action/:id"
     # => match "/:controller(/:action(/:id))(.:format)"
-    with_node type: 'send', receiver: 'map', message: 'connect', arguments: { first: %r|:controller/:action/:id| } do
+    with_node type: 'send', receiver: 'map', message: 'connect', arguments: { first: %r{:controller/:action/:id} } do
       replace_with 'match "/:controller(/:action(/:id))(.:format)"'
     end
 
     # map.connect "audio/:action/:id", :controller => "audio"
     # => match "audio(/:action(/:id))(.:format)", :controller => "audio"
-    with_node type: 'send', receiver: 'map', message: 'connect', arguments: { first: %r|(.*?)/:action/:id| } do
+    with_node type: 'send', receiver: 'map', message: 'connect', arguments: { first: %r{(.*?)/:action/:id} } do
       options_node = node.arguments.last
       if options_node.type == :hash && options_node.has_key?(:controller)
         controller_name = options_node.hash_value(:controller).to_value
@@ -279,7 +279,7 @@
 
     # map.connect "video/:action", :controller => "video"
     # => match "video(/:action)(.:format)", :controller => "video"
-    with_node type: 'send', receiver: 'map', message: 'connect', arguments: { first: %r|(.*?)/:action['"]$| } do
+    with_node type: 'send', receiver: 'map', message: 'connect', arguments: { first: %r{(.*?)/:action['"]$} } do
       options_node = node.arguments.last
       if options_node.type == :hash && options_node.has_key?(:controller)
         controller_name = options_node.hash_value(:controller).children.last
diff --git a/lib/rails/convert_views_2_3_to_3_0.rb b/lib/rails/convert_views_2_3_to_3_0.rb
index b7808926..561052a7 100644
--- a/lib/rails/convert_views_2_3_to_3_0.rb
+++ b/lib/rails/convert_views_2_3_to_3_0.rb
@@ -15,7 +15,7 @@
         <% end %>
   EOF
 
-  %w(app/views/**/*.html.erb app/helpers/**/*.rb).each do |file_pattern|
+  %w[app/views/**/*.html.erb app/helpers/**/*.rb].each do |file_pattern|
     # <%= h user.login %> => <%= user.login %>
     within_files file_pattern do
       with_node type: 'send', receiver: nil, message: 'h' do
@@ -23,7 +23,7 @@
       end
     end
 
-    %w(form_for form_tag fields_for div_for content_tag_for).each do |message|
+    %w[form_for form_tag fields_for div_for content_tag_for].each do |message|
       # <% form_for post do |f| %>
       # <% end %>
       # =>
diff --git a/lib/rails/upgrade_3_0_to_3_1.rb b/lib/rails/upgrade_3_0_to_3_1.rb
index f70c775f..9a33b5fd 100644
--- a/lib/rails/upgrade_3_0_to_3_1.rb
+++ b/lib/rails/upgrade_3_0_to_3_1.rb
@@ -141,7 +141,7 @@ def down
   within_files 'db/migrate/*.rb' do
     # def self.up => def up
     # def self.down => def down
-    %w(up down).each do |name|
+    %w[up down].each do |name|
       with_node type: 'defs', name: name do
         replace_with "def #{name}
     {{body}}
diff --git a/lib/rails/upgrade_3_1_to_3_2.rb b/lib/rails/upgrade_3_1_to_3_2.rb
index 9746de0b..60a0b0ae 100644
--- a/lib/rails/upgrade_3_1_to_3_2.rb
+++ b/lib/rails/upgrade_3_1_to_3_2.rb
@@ -47,7 +47,7 @@
     # set_sequence_name = "seq" => self.sequence_name = "seq"
     # set_primary_key = "id" => self.primary_key = "id"
     # set_locking_column = "lock" => self.locking_column = "lock"
-    %w(set_table_name set_inheritance_column set_sequence_name set_primary_key set_locking_column).each do |message|
+    %w[set_table_name set_inheritance_column set_sequence_name set_primary_key set_locking_column].each do |message|
       with_node type: 'send', message: message do
         new_message = message.sub('set_', '')
         replace_with "self.#{new_message} = {{arguments}}"
diff --git a/lib/rails/upgrade_3_2_to_4_0.rb b/lib/rails/upgrade_3_2_to_4_0.rb
index 564005ba..3bd80ed3 100644
--- a/lib/rails/upgrade_3_2_to_4_0.rb
+++ b/lib/rails/upgrade_3_2_to_4_0.rb
@@ -246,7 +246,7 @@
 
   within_files 'app/models/**/*.rb' do
     # has_many :comments, dependent: :restrict => has_many :comments, dependent: restrict_with_exception
-    %w(has_one has_many).each do |message|
+    %w[has_one has_many].each do |message|
       within_node type: 'send', receiver: nil, message: message do
         with_node type: 'pair', key: 'dependent', value: :restrict do
           replace_with 'dependent: :restrict_with_exception'
diff --git a/lib/rspec/new_hook_scope.rb b/lib/rspec/new_hook_scope.rb
index d5d0a00e..4b5c6e27 100644
--- a/lib/rspec/new_hook_scope.rb
+++ b/lib/rspec/new_hook_scope.rb
@@ -23,7 +23,7 @@
     # before(:all) { do_something }
     # =>
     # before(:context) { do_something }
-    %w(before after around).each do |scope|
+    %w[before after around].each do |scope|
       with_node type: 'send', message: scope, arguments: [:all] do
         replace_with add_receiver_if_necessary("#{scope}(:context)")
       end
diff --git a/lib/rspec/pending_to_skip.rb b/lib/rspec/pending_to_skip.rb
index 51bfa4ac..1b692d45 100644
--- a/lib/rspec/pending_to_skip.rb
+++ b/lib/rspec/pending_to_skip.rb
@@ -83,7 +83,7 @@
       replace_with 'skip {{arguments}}'
     end
 
-    %w(it describe context).each do |message|
+    %w[it describe context].each do |message|
       # it 'is skipped', :pending => true do
       #   do_something_possibly_fail
       # end
diff --git a/lib/rspec/remove_monkey_patches.rb b/lib/rspec/remove_monkey_patches.rb
index d37de5c1..a2e2dd65 100644
--- a/lib/rspec/remove_monkey_patches.rb
+++ b/lib/rspec/remove_monkey_patches.rb
@@ -24,7 +24,7 @@
 
   if_gem 'rspec', { gte: '3.0.0' }
 
-  monkey_patches_methods = %w(describe shared_examples shared_examples_for shared_context)
+  monkey_patches_methods = %w[describe shared_examples shared_examples_for shared_context]
 
   within_files 'spec/**/*.rb' do
     top_level = true
diff --git a/lib/ruby/merge_to_square_brackets.rb b/lib/ruby/merge_to_square_brackets.rb
index 5609cb84..b8823ccd 100644
--- a/lib/ruby/merge_to_square_brackets.rb
+++ b/lib/ruby/merge_to_square_brackets.rb
@@ -52,7 +52,7 @@
     within_node type: 'block', caller: { type: 'send', message: 'inject' }, arguments: { size: 2 }, body: { size: 1 } do
       hash_name = node.arguments.first.name.to_s
       block_start_line = node.line
-      %w(merge merge!).each do |message|
+      %w[merge merge!].each do |message|
         with_node type: 'send', receiver: hash_name, message: message, arguments: { size: 1, first: { type: 'hash' } } do
           merge_line = node.line
           splitter = block_start_line == merge_line ? '; ' : "\n"
@@ -76,7 +76,7 @@
     within_node type: 'block', caller: { type: 'send', message: 'each_with_object' }, arguments: { size: 2 }, body: { size: 1 } do
       hash_name = node.arguments.last.name.to_s
       block_start_line = node.line
-      %w(merge merge!).each do |message|
+      %w[merge merge!].each do |message|
         with_node type: 'send', receiver: hash_name, message: message, arguments: { size: 1, first: { type: 'hash' } } do
           merge_line = node.line
           splitter = block_start_line == merge_line ? '; ' : "\n"
diff --git a/lib/ruby/new_safe_navigation_operator.rb b/lib/ruby/new_safe_navigation_operator.rb
index 5eef2b1e..c1ef4366 100644
--- a/lib/ruby/new_safe_navigation_operator.rb
+++ b/lib/ruby/new_safe_navigation_operator.rb
@@ -18,7 +18,7 @@
       # =>
       # u.?profile.?thumbnails.?large(100, format: 'jpg')
       # u.?profile.?thumbnails.?large(100, format: 'jpg')
-      %w(try! try).each do |message|
+      %w[try! try].each do |message|
         within_node type: 'send', message: message do
           if node.arguments.size == 0
             # Do nothing
diff --git a/lib/ruby/remove_debug_code.rb b/lib/ruby/remove_debug_code.rb
index f6f65187..a301555e 100644
--- a/lib/ruby/remove_debug_code.rb
+++ b/lib/ruby/remove_debug_code.rb
@@ -7,7 +7,7 @@
 
   within_files '**/*.rb' do
     # removes puts and p methods
-    %w(puts p).each do |message|
+    %w[puts p].each do |message|
       with_node type: 'send', message: message do
         remove
       end
diff --git a/lib/ruby/use_symbol_to_proc.rb b/lib/ruby/use_symbol_to_proc.rb
index d9faf578..e13cddeb 100644
--- a/lib/ruby/use_symbol_to_proc.rb
+++ b/lib/ruby/use_symbol_to_proc.rb
@@ -21,7 +21,7 @@
     # (1..100).map { |i| i.to_s }
     # =>
     # (1..100).map(&:to_s)
-    %w(each map).each do |message|
+    %w[each map].each do |message|
       with_node type: 'block', caller: { message: message }, arguments: { size: 1 } do
         argument_name = node.arguments.first.name.to_s
         if_only_exist_node type: 'send', receiver: argument_name, arguments: { size: 0 } do
diff --git a/lib/shoulda/fix_deprecations.rb b/lib/shoulda/fix_deprecations.rb
index e043cd4f..c185b16b 100644
--- a/lib/shoulda/fix_deprecations.rb
+++ b/lib/shoulda/fix_deprecations.rb
@@ -45,8 +45,8 @@
 
   if_gem 'shoulda-matchers', { gte: '1.5.0' }
 
-  unit_test_file_patterns = %w(test/unit/**/*_test.rb spec/models/**/*_spec.rb)
-  function_test_file_patterns = %w(test/functional/**/*_test.rb spec/controllers/**/*_spec.rb)
+  unit_test_file_patterns = %w[test/unit/**/*_test.rb spec/models/**/*_spec.rb]
+  function_test_file_patterns = %w[test/functional/**/*_test.rb spec/controllers/**/*_spec.rb]
 
   unit_test_file_patterns.each do |file_pattern|
     within_files file_pattern do
diff --git a/lib/shoulda/use_matcher_syntax.rb b/lib/shoulda/use_matcher_syntax.rb
index 9a764f67..bbb7ff5c 100644
--- a/lib/shoulda/use_matcher_syntax.rb
+++ b/lib/shoulda/use_matcher_syntax.rb
@@ -140,8 +140,8 @@
     end
   end
 
-  unit_test_file_patterns = %w(test/unit/**/*_test.rb spec/models/**/*_spec.rb)
-  functional_test_file_patterns = %w(test/functional/**/*_test.rb spec/controllers/**/*_spec.rb)
+  unit_test_file_patterns = %w[test/unit/**/*_test.rb spec/models/**/*_spec.rb]
+  functional_test_file_patterns = %w[test/functional/**/*_test.rb spec/controllers/**/*_spec.rb]
 
   unit_test_file_patterns.each do |file_pattern|
     within_files file_pattern do
@@ -156,10 +156,10 @@
       # should_allow_mass_assignment_of :first_name
       # =>
       # should allow_mass_assignment_of(:first_name)
-      %w(should_belong_to should_have_one should_have_many should_have_and_belong_to_many
+      %w[should_belong_to should_have_one should_have_many should_have_and_belong_to_many
          should_validate_presence_of should_validate_uniqueness_of should_validate_numericality_of should_validate_acceptance_of
          should_allow_mass_assignment_of should_not_allow_mass_assignment_of
-         should_have_readonly_attributes should_not_have_readonly_attributes).each do |message|
+         should_have_readonly_attributes should_not_have_readonly_attributes].each do |message|
         with_node type: 'send', message: message do
           new_message = message.start_with?('should_not') ? message.sub('should_not_', 'should_not ') : message.sub('_', ' ')
           if node.arguments.size == 1
@@ -218,7 +218,7 @@
       # =>
       # should allow_value('isbn 1 2345 6789 0').for(:isbn)
       # should allow_value('ISBN 1-2345-6789-0').for(:isbn)
-      %w(should_allow_values_for should_not_allow_values_for).each do |message|
+      %w[should_allow_values_for should_not_allow_values_for].each do |message|
         with_node type: 'send', message: message do
           should_or_should_not = message.include?('_not') ? 'should_not' : 'should'
           field = node.arguments.first.to_source
@@ -313,7 +313,7 @@
       # should_render_template :new => should render_template(:new)
       #
       # should_render_with_layout "special" => should render_with_layout("special")
-      %w(should_respond_with should_respond_with_content_type should_render_template should_render_with_layout).each do |message|
+      %w[should_respond_with should_respond_with_content_type should_render_template should_render_with_layout].each do |message|
         with_node type: 'send', message: message do
           new_message = message.sub('_', ' ')
           replace_with "#{new_message}({{arguments}})"