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-rw-r--r--toplevel/usage.ml3
1 files changed, 2 insertions, 1 deletions
diff --git a/toplevel/usage.ml b/toplevel/usage.ml
index 504ffa52..d85fed5f 100644
--- a/toplevel/usage.ml
+++ b/toplevel/usage.ml
@@ -72,7 +72,8 @@ let print_usage_channel co command =
\n -boot boot mode (implies -q and -batch)\
\n -bt print backtraces (requires configure debug flag)\
\n -debug debug mode (implies -bt)\
-\n -stm-debug STM debug mode (will trace every transaction) \
+\n -diffs (on|off|removed) highlight differences between proof steps\
+\n -stm-debug STM debug mode (will trace every transaction)\
\n -emacs tells Coq it is executed under Emacs\
\n -noglob do not dump globalizations\
\n -dump-glob f dump globalizations in file f (to be used by coqdoc)\