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-rw-r--r--printing/proof_diffs.ml2
1 files changed, 1 insertions, 1 deletions
diff --git a/printing/proof_diffs.ml b/printing/proof_diffs.ml
index cc1bcc66ae..3e2093db4a 100644
--- a/printing/proof_diffs.ml
+++ b/printing/proof_diffs.ml
@@ -52,7 +52,7 @@ let write_diffs_option = function
| "removed" -> diff_option := `REMOVED
| _ -> CErrors.user_err Pp.(str "Diffs option only accepts the following values: \"off\", \"on\", \"removed\".")
-let _ =
+let () =
Goptions.(declare_string_option {
optdepr = false;
optname = "show diffs in proofs";