some small doc nits

[Ralf Wildenhues]

I have applied this patch as hopefully very obvious.  ;-)

Cheers,
Ralf

        * doc/autoconf.texi (Configuration Actions): Remove duplicate
        address@hidden', for texi2html.
        (Systemology): Some more word wrapping, for DVI output.
        (autom4te Invocation): The short option for `--melt' is `-M',
        not `-m'.

Index: doc/autoconf.texi
===================================================================
RCS file: /cvsroot/autoconf/autoconf/doc/autoconf.texi,v
retrieving revision 1.1048
diff -u -r1.1048 autoconf.texi
--- doc/autoconf.texi   15 Jun 2006 08:47:21 -0000      1.1048
+++ doc/autoconf.texi   15 Jun 2006 13:14:30 -0000
@@ -2000,7 +2000,7 @@
 where the arguments are:
 
 @table @var
address@hidden @address@hidden
address@hidden address@hidden
 A blank-or-newline-separated list of tags, which are typically the names of
 the files to instantiate.
 
@@ -7950,7 +7950,7 @@
 Officially this was called the ``Seventh Edition'' of ``the @sc{unix}
 time-sharing system'' but we use the more-common name ``Unix version 7''.
 Documentation is available in the
address@hidden://plan9.bell-labs.com/7thEdMan/, Unix Seventh Edition Manual}.
address@hidden://plan9.bell-labs.com/@/7thEdMan/, Unix Seventh Edition Manual}.
 Previous versions of Unix are called ``Unix version 6'', etc., but
 they were not as widely used.
 @end table
@@ -9276,7 +9276,7 @@
 warnings; if you want them, just pass @option{-W error}.
 
 @item --melt
address@hidden -m
address@hidden -M
 Do not use frozen files.  Any argument @address@hidden is
 replaced by @address@hidden  This helps tracing the macros which
 are executed only when the files are frozen, typically