swift234

Have -verify mode emit the expected diagnostic text as a fixit to avoid confusing and redundant output,
e.g.:

/Users/sabre/Projects/swiftsource/swift/test/Constraints/existential_metatypes.swift:17:28: error: incorrect message found
pp = pt // expected-error{{cannot assign a value of type 'P.Type' to a value of type 'P.Protocol'}}
                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                           'P.Type' is not convertible to 'P.Protocol'



Swift SVN r30626