fixed path to ruby

spec/dummy/bin/bundle

@@ -1,3 +1,3 @@
-#!/usr/bin/env ruby2.2
+#!/usr/bin/env ruby
 ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile', __FILE__)
 load Gem.bin_path('bundler', 'bundle')

spec/dummy/bin/rails

@@ -1,4 +1,4 @@
-#!/usr/bin/env ruby2.2
+#!/usr/bin/env ruby
 APP_PATH = File.expand_path('../../config/application', __FILE__)
 require_relative '../config/boot'
 require 'rails/commands'

spec/dummy/bin/rake

@@ -1,4 +1,4 @@
-#!/usr/bin/env ruby2.2
+#!/usr/bin/env ruby
 require_relative '../config/boot'
 require 'rake'
 Rake.application.run

spec/dummy/bin/setup

@@ -1,4 +1,4 @@
-#!/usr/bin/env ruby2.2
+#!/usr/bin/env ruby
 require 'pathname'
 
 # path to your application root.