fix indentation issue found thanks to the new error

Author: edgarfgp

tests/fsharp/typecheck/sigs/neg17.fs

@@ -67,7 +67,7 @@ module M =
        static member Method34() = noErrorPrivateValueLaterInferredToInvolvePrivateUnionType := [DefaultTagOfPrivateType(3)]
        static member Method35() = noErrorPrivateValueLaterInferredToInvolveInternalUnionType := [DefaultTagOfInternalType(3)]
 
-    type Type with 
+   type Type with 
 
          // Check we can access private things from an in-file augmentation
          member        x.NoError51 = x.PrivateProperty