bin/travis in travis-1.11.1 vs bin/travis in travis-1.12.0

@@ -1,17 +1,19 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 # :(
 Encoding.default_external = Encoding::UTF_8 if defined? Encoding
 
 # load travis library
-require 'bundler/setup' if File.exist? File.expand_path('../../Gemfile', __FILE__)
+require 'bundler/setup' if File.exist? File.expand_path('../Gemfile', __dir__)
 require 'travis/cli'
 
 # load plugins
-TRAVIS_PLUGINS = []
+TRAVIS_PLUGINS = [].freeze
 config_path    = ENV.fetch('TRAVIS_CONFIG_PATH') { File.expand_path('.travis', Dir.home) }
 Dir.glob(File.expand_path('*/init.rb', config_path)) do |file|
-  TRAVIS_PLUGINS << file.sub(config_path + '/', '').sub(/\/init\.rb$/, '')
+  TRAVIS_PLUGINS << file.sub("#{config_path}/", '').sub(%r{/init\.rb$}, '')
   load(file)
 end
 
 # and off we go then
 Travis::CLI.run(ARGV)