Pretty toString adjustmnet to more NotWord-related words.
Another batch of pretty toString for words.
Another batch of pretty toString in words.
Comment addition in NotWord.scala and amendment in ResultOfNotExist.scala.
Added support of the missing 'shouldNot contain ...' syntax.
Adjusted ResultOfThrownByApplication's toString.
Completed lazy error message and toString changes in words package.
Changed Matchers.scala to construct error message lazily and added pretty toString to Spread.
Work in progress lazy message and pretty toString in Matcher.scala.