SR-11902: Fixed code review issues. Updated tests.

Author: kitaisreal

test/Sema/classes_equatable_hashable.swift

@@ -1,8 +1,8 @@
 // RUN: %target-swift-frontend -typecheck -verify -primary-file %s
 
 class Foo: Equatable {} 
-// expected-error@-1 {{type 'Foo' does not conform to protocol 'Equatable'}} expected-note@-1 {{automatic synthesis of 'Equatable' is not supported for classes because of inheritance.}}
+// expected-error@-1 {{type 'Foo' does not conform to protocol 'Equatable'}} expected-note@-1 {{automatic synthesis of 'Equatable' is not supported for classes}}
 
 class Bar: Hashable {} 
-// expected-error@-1 {{type 'Bar' does not conform to protocol 'Hashable'}} expected-note@-1 {{automatic synthesis of 'Hashable' is not supported for classes because of inheritance.}}
-// expected-error@-2 {{type 'Bar' does not conform to protocol 'Equatable'}} expected-note@-2 {{automatic synthesis of 'Equatable' is not supported for classes because of inheritance.}}
+// expected-error@-1 {{type 'Bar' does not conform to protocol 'Hashable'}} expected-note@-1 {{automatic synthesis of 'Hashable' is not supported for classes}}
+// expected-error@-2 {{type 'Bar' does not conform to protocol 'Equatable'}} expected-note@-2 {{automatic synthesis of 'Equatable' is not supported for classes}}