-error_formal_name.nit:17,9--11: Warning: lowercase in the formal parameter type Foo
-error_formal_name.nit:18,7--9: Warning: lowercase in the virtual type Bar
+error_formal_name.nit:17,9--11: Warning: lowercase in the formal parameter type `Foo`.
+error_formal_name.nit:18,7--9: Warning: lowercase in the virtual type `Bar`.