(define-charset): Update the docstring for

:supplementary-p.

diff --git a/lisp/international/mule.el b/lisp/international/mule.el
index 83468d2..6b90aa8 100644 (file)
--- a/lisp/international/mule.el
+++ b/lisp/international/mule.el
@@ -160,8 +160,9 @@ compatible with ASCII, i.e. the first 128 code points map to ASCII.
 `:supplementary-p'
 
 VALUE must be nil or t.  If the VALUE is t, the charset is
-supplementary, which means it is used only as a parent of some other
-charset.
+supplementary, which means it is used only as a parent or a
+subset of some other charset, or it is provided just for backward
+compatibility.
 
 `:invalid-code'