[6594] use space as sort key if all else fails

[Gavin D. Smith]

Revision: 6594
          http://svn.sv.gnu.org/viewvc/?view=rev&root=texinfo&revision=6594
Author:   gavin
Date:     2015-09-04 10:35:49 +0000 (Fri, 04 Sep 2015)
Log Message:
-----------
use space as sort key if all else fails

Modified Paths:
--------------
    trunk/ChangeLog
    trunk/doc/texinfo.tex

Modified: trunk/ChangeLog
===================================================================
--- trunk/ChangeLog     2015-09-03 22:13:22 UTC (rev 6593)
+++ trunk/ChangeLog     2015-09-04 10:35:49 UTC (rev 6594)
@@ -1,3 +1,8 @@
+2015-08-04  Gavin Smith  <address@hidden>
+
+       * doc/texinfo.tex (\dosubindwrite): If index sort key ends up as 
+       empty, use a space.
+
 2015-08-03  Gavin Smith  <address@hidden>
 
        * doc/texinfo.texi (Indexing Commands): Update documentation of 

Modified: trunk/doc/texinfo.tex
===================================================================
--- trunk/doc/texinfo.tex       2015-09-03 22:13:22 UTC (rev 6593)
+++ trunk/doc/texinfo.tex       2015-09-04 10:35:49 UTC (rev 6594)
@@ -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{2015-09-03.22}
+\def\texinfoversion{2015-09-04.11}
 %
 % Copyright 1985, 1986, 1988, 1990, 1991, 1992, 1993, 1994, 1995,
 % 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
@@ -4888,6 +4888,7 @@
    \setbox\dummybox = \hbox{\temp}% Make sure to execute any \sortas
    \ifx\indexsortkey\empty
      \xdef\indexsortkey{\temp}%
+     \ifx\indexsortkey\empty\xdef\indexsortkey{ }\fi
    \fi
   }%
   %