Added Snapshots.
Make fallback error message for .exists to include source code.
Added missing scaladoc in Requirements.scala.
Fixed scaladoc typo in Snapshots.scala.
Merge branch 'captured-macro' of https://github.com/cheeseng/scalatest
Use SnapshotSeq to get better toString, and also added lines method.
Change to "was" for the error message in Snapshots instead of =.