type 'a t =
| Exact of Base.string |
| Output |
| Pretty of 'a |
| Unreachable |
val sexp_of_t : ('a -> Expect_test_common__.Import.Ppx_sexp_conv_lib.Sexp.t) -> 'a t -> Expect_test_common__.Import.Ppx_sexp_conv_lib.Sexp.t
val map_pretty : 'a t -> f:('a -> 'b) -> 'b t