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bug#30145: [PATCH] doc: Document undefined?.

From: Arun Isaac
Subject: bug#30145: [PATCH] doc: Document undefined?.
Date: Wed, 17 Jan 2018 23:22:04 +0530

* doc/ref/data-rep.texi: Document undefined?.
 doc/ref/data-rep.texi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/doc/ref/data-rep.texi b/doc/ref/data-rep.texi
index bb7f74afe..ed3a5a522 100644
--- a/doc/ref/data-rep.texi
+++ b/doc/ref/data-rep.texi
@@ -470,6 +470,9 @@ check to see if @var{x} is @code{SCM_UNBOUND}.  History 
will not be kind
 to us.
 @end deftypefn
address@hidden {Scheme Procedure} undefined? x
+Return @code{#t} if @var{x} is undefined, else @code{#f}.
address@hidden deffn
 @node Non-immediate objects
 @subsubsection Non-immediate objects

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