feat: add support for highlight .cpy and .cpb files as COBOL

Author: gustavosimon

lib/rouge/lexers/cobol.rb

@@ -7,7 +7,7 @@ class COBOL < RegexLexer
       title 'COBOL'
       desc 'COBOL (Common Business-Oriented Language) programming language'
       tag 'cobol'
-      filenames '*.cob', '*.cbl'
+      filenames '*.cob', '*.cbl', '*.cpy', '*.cpb'
       mimetypes 'text/x-cobol'
 
       identifier = /\p{Alpha}[\p{Alnum}-]*/

spec/lexers/cobol_spec.rb

@@ -70,6 +70,8 @@
     it 'guesses by filename' do
       assert_guess :filename => 'foo.cob'
       assert_guess :filename => 'foo.cbl'
+      assert_guess :filename => 'foo.cpy'
+      assert_guess :filename => 'foo.cpb'
     end
 
     it 'guesses by mimetype' do