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-rw-r--r--lisp/textmodes/fill.el5
1 files changed, 4 insertions, 1 deletions
diff --git a/lisp/textmodes/fill.el b/lisp/textmodes/fill.el
index 14f7e23d4c0..3c88abc615c 100644
--- a/lisp/textmodes/fill.el
+++ b/lisp/textmodes/fill.el
@@ -38,7 +38,10 @@ A value of nil means that any change in indentation starts a new paragraph."
:group 'fill)
(defcustom sentence-end-double-space t
- "*Non-nil means a single space does not end a sentence."
+ "*Non-nil means a single space does not end a sentence.
+
+If you change this, you should also change `sentence-end'.
+See Info node `Sentences'."
:type 'boolean
:group 'fill)