update from texinfo

diff --git a/build-aux/texinfo.tex b/build-aux/texinfo.tex
index 629b88b12bc271528714d33ba02153d249c48769..331986b2f3eedf42d5f3dfb608a2d1fa5228615e 100644 (file)
--- a/build-aux/texinfo.tex
+++ b/build-aux/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{2007-03-14.11}
+\def\texinfoversion{2007-04-07.08}
 %
 % Copyright (C) 1985, 1986, 1988, 1990, 1991, 1992, 1993, 1994, 1995,
 % 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
@@ -1321,7 +1321,7 @@ output) for that.)}
     \makevalueexpandable
     \def\pdfdestname{#1}%
     \backslashparens\pdfdestname
-    \pdfdest name{\pdfdestname} xyz%
+    \safewhatsit{\pdfdest name{\pdfdestname} xyz}%
   }}
   %
   % used to mark target names; must be expandable.
@@ -3747,11 +3747,7 @@ output) for that.)}
     %
     \edef\writeto{\csname#1indfile\endcsname}%
     %
-    \ifvmode
-      \dosubindsanitize
-    \else
-      \dosubindwrite
-    \fi
+    \safewhatsit\dosubindwrite
   }%
   \fi
 }
@@ -3788,13 +3784,13 @@ output) for that.)}
   \temp
 }
 
-% Take care of unwanted page breaks:
+% Take care of unwanted page breaks/skips around a whatsit:
 %
 % If a skip is the last thing on the list now, preserve it
 % by backing up by \lastskip, doing the \write, then inserting
 % the skip again.  Otherwise, the whatsit generated by the
-% \write will make \lastskip zero.  The result is that sequences
-% like this:
+% \write or \pdfdest will make \lastskip zero.  The result is that
+% sequences like this:
 % @end defun
 % @tindex whatever
 % @defun ...
@@ -3818,13 +3814,19 @@ output) for that.)}
 %
 \edef\zeroskipmacro{\expandafter\the\csname z@skip\endcsname}
 %
+\newskip\whatsitskip
+\newcount\whatsitpenalty
+%
 % ..., ready, GO:
 %
-\def\dosubindsanitize{%
+\def\safewhatsit#1{%
+\ifhmode
+  #1%
+\else
   % \lastskip and \lastpenalty cannot both be nonzero simultaneously.
-  \skip0 = \lastskip
+  \whatsitskip = \lastskip
   \edef\lastskipmacro{\the\lastskip}%
-  \count255 = \lastpenalty
+  \whatsitpenalty = \lastpenalty
   %
   % If \lastskip is nonzero, that means the last item was a
   % skip.  And since a skip is discardable, that means this
@@ -3833,10 +3835,10 @@ output) for that.)}
   % breakpoint, therefore no \nobreak needed.
   \ifx\lastskipmacro\zeroskipmacro
   \else
-    \vskip-\skip0
+    \vskip-\whatsitskip
   \fi
   %
-  \dosubindwrite
+  #1%
   %
   \ifx\lastskipmacro\zeroskipmacro
     % If \lastskip was zero, perhaps the last item was a penalty, and
@@ -3850,13 +3852,14 @@ output) for that.)}
     %   Description.
     % would allow a break between the index-whatever whatsit
     % and the "Description." paragraph.
-    \ifnum\count255>9999 \penalty\count255 \fi
+    \ifnum\whatsitpenalty>9999 \penalty\whatsitpenalty \fi
   \else
     % On the other hand, if we had a nonzero \lastskip,
     % this make-up glue would be preceded by a non-discardable item
     % (the whatsit from the \write), so we must insert a \nobreak.
-    \nobreak\vskip\skip0
+    \nobreak\vskip\whatsitskip
   \fi
+\fi
 }
 
 % The index entry written in the file actually looks like
@@ -5631,21 +5634,28 @@ output) for that.)}
 \newskip\defbodyindent \defbodyindent=.4in
 \newskip\defargsindent \defargsindent=50pt
 \newskip\deflastargmargin \deflastargmargin=18pt
+\newcount\defunpenalty
 
 % Start the processing of @deffn:
 \def\startdefun{%
   \ifnum\lastpenalty<10000
     \medbreak
+    \defunpenalty=10003 % Will keep this @deffn together with the
+                        % following @def command, see below.
   \else
     % If there are two @def commands in a row, we'll have a \nobreak,
     % which is there to keep the function description together with its
     % header.  But if there's nothing but headers, we need to allow a
     % break somewhere.  Check specifically for penalty 10002, inserted
-    % by \defargscommonending, instead of 10000, since the sectioning
+    % by \printdefunline, instead of 10000, since the sectioning
     % commands also insert a nobreak penalty, and we don't want to allow
     % a break between a section heading and a defun.
-    % 
-    \ifnum\lastpenalty=10002 \penalty2000 \fi
+    %
+    % As a minor refinement, we avoid "club" headers by signalling
+    % with penalty of 10003 after the very first @deffn in the
+    % sequence (see above), and penalty of 10002 after any following
+    % @def command.
+    \ifnum\lastpenalty=10002 \penalty2000 \else \defunpenalty=10002 \fi
     %
     % Similarly, after a section heading, do not allow a break.
     % But do insert the glue.
@@ -5663,7 +5673,7 @@ output) for that.)}
   %
   % As above, allow line break if we have multiple x headers in a row.
   % It's not a great place, though.
-  \ifnum\lastpenalty=10002 \penalty3000 \fi
+  \ifnum\lastpenalty=10002 \penalty3000 \else \defunpenalty=10002 \fi
   %
   % And now, it's time to reuse the body of the original defun:
   \expandafter\gobbledefun#1%
@@ -5681,7 +5691,7 @@ output) for that.)}
     \advance\rightskip by 0pt plus 1fil
     \endgraf
     \nobreak\vskip -\parskip
-    \penalty 10002  % signal to \startdefun and \dodefunx
+    \penalty\defunpenalty  % signal to \startdefun and \dodefunx
     % Some of the @defun-type tags do not enable magic parentheses,
     % rendering the following check redundant.  But we don't optimize.
     \checkparencounts
@@ -6347,7 +6357,7 @@ output) for that.)}
       \toks0 = \expandafter{\thissection}%
       \immediate \writexrdef{title}{\the\toks0 }%
       \immediate \writexrdef{snt}{\csname #2\endcsname}% \Ynumbered etc.
-      \writexrdef{pg}{\folio}% will be written later, during \shipout
+      \safewhatsit{\writexrdef{pg}{\folio}}% will be written later, during \shipout
     }%
   \fi
 }