Merge pull request #1741 from github/test-helper

Add test helper to make test env consistent

test/test_language.rb

@@ -1,6 +1,4 @@
-require 'linguist/language'
-require 'test/unit'
-require 'yaml'
+require_relative "./helper"
 
 class TestLanguage < Test::Unit::TestCase
   include Linguist