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-rw-r--r--lib/richPp.mli4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/richPp.mli b/lib/richPp.mli
index 59d4c6af43..834115d40b 100644
--- a/lib/richPp.mli
+++ b/lib/richPp.mli
@@ -9,8 +9,8 @@
(** This module offers semi-structured pretty-printing. *)
(** A pretty printer module must use an instance of the following
- functor to index annotations. The index must be used as Format.tag
- during the pretty-printing. *)
+ functor to index annotations. The index is to be used as a
+ [Format.tag] during the pretty-printing. *)
(** The indices are Format.tags. *)
type index = Format.tag (* = string *)