--- a/config/texinfo.tex
+++ b/config/texinfo.tex
@@ -3,7 +3,7 @@
 % Load plain if necessary, i.e., if running under initex.
 \expandafter\ifx\csname fmtname\endcsname\relax\input plain\fi
 %
-\def\texinfoversion{2003-11-15.06}
+\def\texinfoversion{2003-11-15.16}
 %
 % Copyright (C) 1985, 1986, 1988, 1990, 1991, 1992, 1993, 1994, 1995,
 % 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
@@ -4694,7 +4694,8 @@
 % @quotation does normal linebreaking (hence we can't use \nonfillstart)
 % and narrows the margins.
 %
-\def\quotation{%
+\def\quotation{\parsearg\doquotation}
+\def\doquotation#1{%
   \begingroup\inENV %This group ends at the end of the @quotation body
   {\parskip=0pt \aboveenvbreak}% because \aboveenvbreak inserts \parskip
   \parindent=0pt
@@ -4709,6 +4710,12 @@
     \exdentamount = \lispnarrowing
     \let\nonarrowing = \relax
   \fi
+  %
+  % If we're given an argument, typeset it in bold with a colon after.
+  \def\thearg{#1}%
+  \ifx\thearg\empty \else
+    {\bf \thearg:}
+  \fi
 }