to_sentence (Spec::Matchers::Pretty)

    # File lib/spec/matchers/pretty.rb, line 8
          def to_sentence(words)
            words = words.map{|w| w.inspect}
            case words.length
              when 0
                ""
              when 1
                " #{words[0]}"
              when 2
                " #{words[0]} and #{words[1]}"
              else
                " #{words[0...-1].join(', ')}, and #{words[-1]}"
            end
          end