"yml" ☞ YAML

lib/linguist/languages.yml

@@ -1324,6 +1324,8 @@ XSLT:
 
 YAML:
   type: markup
+  aliases:
+  - yml
   primary_extension: .yml
   extensions:
   - .yaml

test/test_language.rb

@@ -109,6 +109,7 @@ class TestLanguage < Test::Unit::TestCase
     assert_equal Language['VimL'], Language.find_by_alias('vim')
     assert_equal Language['VimL'], Language.find_by_alias('viml')
     assert_equal Language['reStructuredText'], Language.find_by_alias('rst')
+    assert_equal Language['YAML'], Language.find_by_alias('yml')
   end
 
   def test_groups