ContainWithResult can have misleading failure messages with certain options

[coreywoodfield]

import org.specs2.matcher.ValueCheck
import org.specs2.mutable.Specification

class Spec extends Specification {
  "strings" should {
    "all be unique" in {
      val strings = List("foo", "foo", "bar", "qux")
      strings.map { string =>
        strings must contain(string: ValueCheck[String]).exactly(1.times)
      }
    }
  }
}

fails with the message

List(foo, foo, bar, qux) does not contain foo

which is obviously false. It's not a huge deal with such small lists, but when lists have hundreds of elements, and you just read the beginning and the end of the failure message, it can be a lot more confusing:

List(foo, bar, qux, ...) does not contain foo

The methods that change the behavior of ContainWithResult should also change the failure message.

[etorreborre]

Thanks for reporting this issue. You can see some examples of fixed messages here. I will release a new version very soon.