* div.cc (macro_diversion::output, top_level_diversion::output):

Fixing an incompatibility with original troff: x'0' updates the
.a register also.  Thanks to <Andries.Brouwer@cwi.nl> for pointing
this out.
* doc/groff.texinfo: Document it.

3 files changed, 12 insertions, 6 deletions

diff --git a/ChangeLog b/ChangeLog
index 95964525..cfc4b1e7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2000-03-05  Werner LEMBERG  <wl@gnu.org>
+
+	* div.cc (macro_diversion::output, top_level_diversion::output):
+	Fixing an incompatibility with original troff: \x'0' updates the
+	.a register also.  Thanks to <Andries.Brouwer@cwi.nl> for pointing
+	this out.
+	* doc/groff.texinfo: Document it.
+
 2000-03-04  Werner LEMBERG  <wl@gnu.org>
 
 	* tmac/troffrc: Add tmac.lbp.
diff --git a/doc/groff.texinfo b/doc/groff.texinfo
index 429f9875..bf041710 100644
--- a/doc/groff.texinfo
+++ b/doc/groff.texinfo
@@ -2846,7 +2846,7 @@ escape will do this.  The escape is given a numerical argument (like
 inserted below the current line.  A negative number will add space
 above.  If this escape is used multiple times on the same line, the
 maximum of the values is used.  The @code{.a} number register contains
-the most recent extra vertical line space.
+the most recent (nonnegative) extra vertical line space.
 
 @c XXX
 @example
@@ -4262,7 +4262,7 @@ name.
 This would be called as
 
 @example
-.vl $Id: groff.texinfo,v 1.13 2000/02/29 22:09:32 wlemb Exp $
+.vl $Id: groff.texinfo,v 1.14 2000/03/05 12:11:22 wlemb Exp $
 @end example
 
 @xref{Request Arguments}.
diff --git a/src/roff/troff/div.cc b/src/roff/troff/div.cc
index 7a40d808..013ea669 100644
--- a/src/roff/troff/div.cc
+++ b/src/roff/troff/div.cc
@@ -235,8 +235,7 @@ void macro_diversion::output(node *nd, int retain_size,
       mac->append(temp);
     }
   }
-  if (!v.post_extra.is_zero())
-    last_post_line_extra_space = v.post_extra.to_units();
+  last_post_line_extra_space = v.post_extra.to_units();
   if (!retain_size) {
     v.pre = vs;
     v.post = post_vs;
@@ -339,8 +338,7 @@ void top_level_diversion::output(node *nd, int retain_size,
   vertical_size v(vs, post_vs);
   for (node *tem = nd; tem != 0; tem = tem->next)
     tem->set_vertical_size(&v);
-  if (!v.post_extra.is_zero())
-    last_post_line_extra_space = v.post_extra.to_units();
+  last_post_line_extra_space = v.post_extra.to_units();
   if (!retain_size) {
     v.pre = vs;
     v.post = post_vs;