From: Glenn Morris <rgm@gnu.org>
Date: Wed, 8 Aug 2007 07:56:45 +0000 (+0000)
Subject: (Documentation Tips): Recommend against `iff'.
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(Documentation Tips): Recommend against `iff'.
---

diff --git a/lispref/tips.texi b/lispref/tips.texi
index de590c4cf9d..f3070f4659b 100644
--- a/lispref/tips.texi
+++ b/lispref/tips.texi
@@ -844,6 +844,12 @@ Avoid using the word ``cause'' (or its equivalents) unnecessarily.
 Instead of, ``Cause Emacs to display text in boldface,'' write just
 ``Display text in boldface.''
 
+@item
+Avoid using ``iff'' (a mathematics term meaning ``if and only if''),
+since many people are unfamiliar with it and mistake it for a typo.  In
+most cases, the meaning is clear with just ``if''.  Otherwise, try to
+find an alternate phrasing that conveys the meaning.
+
 @item
 When a command is meaningful only in a certain mode or situation,
 do mention that in the documentation string.  For example,