Qualify the `-flag' convention.

diff --git a/doc/lispref/variables.texi b/doc/lispref/variables.texi
index 75cfd783c6eb64eb15b4a3fc86a484a486e1e011..d09b06f3657fa096d512ac3f7f373315d331a79f 100644 (file)
--- a/doc/lispref/variables.texi
+++ b/doc/lispref/variables.texi
@@ -621,6 +621,8 @@ arguments.
 
 @item @dots{}-flag
 The value is significant only as to whether it is @code{nil} or not.
+Since such variables often end up acquiring more values over time,
+this convetion is not strongly recommended.
 
 @item @dots{}-program
 The value is a program name.