Adjust formatting to match.
Add class name to failure message in equality checks

Added to descriptino of KWEqualMatcher as well, for consistency.

Fixes #348
Merge remote-tracking branch 'upstream/master' into classes-in-failure-message
s/formatPrefixedObject/formatObjectIncludingClass/ for clarity
Merge pull request #350 from smartlogic/classes-in-failure-message

Show class names in equality failure message.