add frozen string literal comments

.simplecov

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 SimpleCov.configure do
   enable_coverage :branch
   add_filter '/spec/'

Gemfile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source "http://rubygems.org"
 
 gemspec

Rakefile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'bundler'
 Bundler::GemHelper.install_tasks
 

lib/schema_monkey.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'active_record'
 require 'active_support/core_ext/string'
 require 'modware'

lib/schema_monkey/active_record.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module SchemaMonkey
   module ActiveRecord
     module ConnectionAdapters

lib/schema_monkey/client.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module SchemaMonkey
   class Client
 

lib/schema_monkey/errors.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module SchemaMonkey
   class MiddlewareError < Exception
   end

lib/schema_monkey/module.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module SchemaMonkey
   module Module
     extend self

lib/schema_monkey/monkey.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module SchemaMonkey
 
   # The main manager for the monkey patches.  Singleton instance

lib/schema_monkey/stack.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module SchemaMonkey
   module Stack
     def self.insert(path, mod)

lib/schema_monkey/version.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module SchemaMonkey
   VERSION = "3.0.1"
 end

schema_monkey.gemspec

@@ -1,4 +1,5 @@
-# coding: utf-8
+# frozen_string_literal: true
+
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'schema_monkey/version'

spec/active_record_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 $client_count = 0

spec/connection_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe "Connection" do

spec/middleware_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe SchemaMonkey::Middleware do

spec/module_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe SchemaMonkey::Module do

spec/schema_monkey_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe SchemaMonkey do

spec/spec_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'simplecov'
 SimpleCov.start