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-rw-r--r--lisp/progmodes/prog-mode.el6
1 files changed, 5 insertions, 1 deletions
diff --git a/lisp/progmodes/prog-mode.el b/lisp/progmodes/prog-mode.el
index 6696356a2dc..b459cbfd286 100644
--- a/lisp/progmodes/prog-mode.el
+++ b/lisp/progmodes/prog-mode.el
@@ -132,7 +132,11 @@ narrowing is in effect."
"Alist of symbol prettifications.
Each element looks like (SYMBOL . CHARACTER), where the symbol
matching SYMBOL (a string, not a regexp) will be shown as
-CHARACTER instead.")
+CHARACTER instead.
+
+CHARACTER can be a character or it can be a list or vector, in
+which case it will be used to compose the new symbol as per the
+third argument of `compose-region'.")
(defun prettify-symbols-default-compose-p (start end _match)
"Return true iff the symbol MATCH should be composed.