class RSpec::Matchers::Have

def description_with_errors_on_extensions
  return "have #{relativities[@relativity]}#{@expected} errors on :#{@args[0]}" if @collection_name == :errors_on
  return "have #{relativities[@relativity]}#{@expected} error on :#{@args[0]}"  if @collection_name == :error_on
  return description_without_errors_on_extensions
end