Fix Style/MutableConstant offenses

.rubocop_todo.yml

@@ -71,15 +71,6 @@ Style/MultilineTernaryOperator:
     - 'lib/paper_trail/has_paper_trail.rb'
     - 'lib/paper_trail/reifier.rb'
 
-# Offense count: 4
-# Cop supports --auto-correct.
-Style/MutableConstant:
-  Exclude:
-    - 'lib/generators/paper_trail/templates/create_versions.rb'
-    - 'lib/paper_trail/version_number.rb'
-    - 'test/dummy/app/models/widget.rb'
-    - 'test/unit/associations_test.rb'
-
 # Offense count: 3
 # Cop supports --auto-correct.
 Style/RescueModifier:

lib/generators/paper_trail/templates/create_versions.rb

@@ -5,7 +5,7 @@ class CreateVersions < ActiveRecord::Migration
   MYSQL_ADAPTERS = [
     "ActiveRecord::ConnectionAdapters::MysqlAdapter",
     "ActiveRecord::ConnectionAdapters::Mysql2Adapter"
-  ]
+  ].freeze
 
   # The largest text column available in all supported RDBMS is
   # 1024^3 - 1 bytes, roughly one gibibyte.  We specify a size

lib/paper_trail/version_number.rb

@@ -3,9 +3,9 @@ module PaperTrail
     MAJOR = 5
     MINOR = 0
     TINY  = 0
-    PRE   = "pre"
+    PRE   = "pre".freeze
 
-    STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
+    STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".").freeze
 
     def self.to_s
       STRING

test/dummy/app/models/widget.rb

@@ -3,7 +3,7 @@ class Widget < ActiveRecord::Base
   has_one :wotsit
   has_many :whatchamajiggers, as: :owner
 
-  EXCLUDED_NAME = "Biglet"
+  EXCLUDED_NAME = "Biglet".freeze
 
   validates :name, exclusion: { in: [EXCLUDED_NAME] }
 

test/unit/associations_test.rb

@@ -15,7 +15,7 @@ class AssociationsTest < ActiveSupport::TestCase
     "The Lobster Quadrille",
     "Who Stole the Tarts?",
     "Alice's Evidence"
-  ]
+  ].freeze
 
   # These would have been done in test_helper.rb if using_mysql? is true
   unless using_mysql?