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-rw-r--r--generic/proof-useropts.el2
1 files changed, 1 insertions, 1 deletions
diff --git a/generic/proof-useropts.el b/generic/proof-useropts.el
index 40df67a9..da97e454 100644
--- a/generic/proof-useropts.el
+++ b/generic/proof-useropts.el
@@ -128,7 +128,7 @@ you a reprimand!)."
"*Whether Proof General allows text undo in the read-only region.
If non-nil, undo will allow altering of processed text.
If nil, undo history is cut at first edit
-of processed text. NB: the history manipulation only works on GNU Emacs."
+of processed text."
:type 'boolean
:group 'proof-user-options)