Fix test wibble.

testsuite/tests/safeHaskell/safeLanguage/SafeLang12.stderr

@@ -9,3 +9,4 @@ SafeLang12_B.hs:2:14: Warning:
 SafeLang12_B.hs:14:67:
     Syntax error on ''Class
     Perhaps you intended to use TemplateHaskell
+    In the Template Haskell quotation ''Class