* man/groff.man: Document missing number registers (`$$', `.b',

`.F', `.j', `.k', `.L', `.O', `.P', `.R', `opmaxx', `opmaxy',
`opminx', `opminy').

* doc/groff.texinfo: Document missing `.R' register.
Add `.U' to register index.

1 files changed, 8 insertions, 0 deletions

diff --git a/doc/groff.texinfo b/doc/groff.texinfo
index e0f44a6c..1ff314c2 100644
--- a/doc/groff.texinfo
+++ b/doc/groff.texinfo
@@ -6276,11 +6276,19 @@ This string-valued register returns the current input file name.
 @vindex .H
 Horizontal resolution in basic units.
 
+@item \n[.R]
+@cindex number of registers register (@code{.R})
+@cindex registers, number of, register (@code{.R})
+@vindex .R
+The number of number registers available.  This is always 10000 in
+GNU@tie{}@code{troff}; it exists for backward compatibility.
+
 @item \n[.U]
 @cindex safer mode
 @cindex mode, safer
 @cindex unsafe mode
 @cindex mode, unsafe
+@vindex .U
 If @code{gtroff} is called with the @option{-U} command line option to
 activate unsafe mode, the number register @code{.U} is set to@tie{}1,
 and to zero otherwise.  @xref{Groff Options}.