class RDoc::Parser::Simple

def remove_private_comment comment
  # Workaround for gsub encoding for Ruby 1.9.2 and earlier
  empty = ''
  empty.force_encoding comment.encoding if Object.const_defined? :Encoding
  comment = comment.gsub(%r%^--\n.*?^\+\+\n?%m, empty)
  comment.sub(%r%^--\n.*%m, empty)
end