Toggle left right position in definedAt matcher's error messages.
Added support for newContain newOneof with inspector shorthands.
Factored out the inverted string equality into one place, and added tests for implicit Equality
and explicit Equality for newContain newOneOf inspector shorthands in to OptionShouldContainOneOfSpec.
Added test for (newContain newOneOf (...)) syntax for inspector shorthands, which already passed.
Added support for not newContain newOneOf (...) in inspector shorthands.
Added test for (not newContain newOneOf (...)) for inspector shorthands that already passed.
Moved Holder implcits to companion object.
Moved Length and Size impliicts out of Matchers into companion objects.