* tmac/s.tmac (pg@top): Don't save PO register.

(pg*end-col, pg*end-page): Directly use PO register.

* man/groff_tmac.man: Mention `trace' and `pic' macro packages.

* src/preproc/refer/refer.cpp (output_references): Check for
empty hash table.
* src/preproc/refer/refer.man: Improve documentation of
`bibliography' command.

1 files changed, 36 insertions, 3 deletions

diff --git a/man/groff_tmac.man b/man/groff_tmac.man
index 53ae3e73..030e739f 100644
--- a/man/groff_tmac.man
+++ b/man/groff_tmac.man
@@ -14,11 +14,11 @@ groff_tmac.5
 
 File position: <groff-source>/man/groff_tmac.man
 
-Last update: 15 Jul 2003
+Last update: 27 Jul 2004
 
 This file is part of groff, the GNU roff type-setting system.
 
-Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+Copyright (C) 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
 written by Bernd Warken <bwarken@mayn.de> and Werner Lemberg
 <wl@gnu.org>
 
@@ -342,6 +342,7 @@ This is the classical macro package for UNIX manual pages
 (man\~pages); it is quite handy and easy to use; see
 .BR groff_man (@MAN7EXT@).
 .
+.
 .TP
 .B doc
 .TP+
@@ -453,6 +454,22 @@ orientation:
 .
 .
 .TP
+.B pic
+This file provides proper definitions for the macros
+.B PS
+and
+.BR PE ,
+needed for the
+.BR @g@pic (@MAN1EXT@)
+preprocessor.
+.
+They will center each picture.
+.
+Use it only if your macro package doesn't provide proper definitions
+for those two macros (actually, most of them already have).
+.
+.
+.TP
 .B pspic
 A single macro is provided in this file,
 .BR PSPIC ,
@@ -512,6 +529,17 @@ option causes the graphic to be indented by\~\c
 (default scaling indicator is\~\c
 .BR m ).
 .
+.
+.TP
+.B trace
+Use this for tracing macro calls.
+.
+It is only useful for debugging.
+.
+See
+.BR groff_trace (@MAN7EXT@) .
+.
+.
 .TP
 .B tty-char
 Overrides the definition of standard troff characters and some groff
@@ -1183,7 +1211,7 @@ See the previous section for a detailed description.
 .SH AUTHOR
 .\" --------------------------------------------------------------------
 .
-Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+Copyright (C) 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
 .
 .P
 This document is distributed under the terms of the FDL (GNU Free
@@ -1213,10 +1241,12 @@ groff
 .BR info (1)
 file.
 .
+.
 .TP
 .BR groff (@MAN1EXT@)
 an overview of the groff system.
 .
+.
 .TP
 .BR groff_man (@MAN7EXT@),
 .TP+
@@ -1230,9 +1260,12 @@ an overview of the groff system.
 .TP+
 .BR groff_ms (@MAN7EXT@),
 .TP+
+.BR groff_trace (@MAN7EXT@),
+.TP+
 .BR groff_www (@MAN7EXT@).
 the groff tmac macro packages.
 .
+.
 .TP
 .BR groff (@MAN7EXT@)
 the groff language.