_pretty_print (Spec::Matchers::Pretty)

    # File lib/spec/matchers/pretty.rb, line 22
          def _pretty_print(array)
            result = ""
            array.each_with_index do |item, index|
              if index < (array.length - 2)
                result << "#{item.inspect}, "
              elsif index < (array.length - 1)
                result << "#{item.inspect} and "
              else
                result << "#{item.inspect}"
              end
            end
            result
          end