===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/m4/m4.1,v
retrieving revision 1.46
retrieving revision 1.47
diff -c -r1.46 -r1.47
*** src/usr.bin/m4/m4.1	2006/08/29 18:40:49	1.46
--- src/usr.bin/m4/m4.1	2006/12/12 09:24:22	1.47
***************
*** 1,4 ****
! .\"	@(#) $OpenBSD: m4.1,v 1.46 2006/08/29 18:40:49 mbalmer Exp $
  .\"
  .\" Copyright (c) 1989, 1993
  .\"	The Regents of the University of California.  All rights reserved.
--- 1,4 ----
! .\"	@(#) $OpenBSD: m4.1,v 1.47 2006/12/12 09:24:22 grunk Exp $
  .\"
  .\" Copyright (c) 1989, 1993
  .\"	The Regents of the University of California.  All rights reserved.
***************
*** 50,64 ****
  .Bk -words
  .Op Fl t Ar macro
  .Op Fl U Ns Ar name
  .Ek
  .Sh DESCRIPTION
  The
  .Nm m4
  utility is a macro processor that can be used as a front end to any
  language (e.g., C, ratfor, fortran, lex, and yacc).
  .Nm m4
! reads from the standard input and writes
! the processed text to the standard output.
  .Pp
  Macro calls have the form name(argument1[, argument2, ..., argumentN]).
  .Pp
--- 50,73 ----
  .Bk -words
  .Op Fl t Ar macro
  .Op Fl U Ns Ar name
+ .Op Ar
  .Ek
  .Sh DESCRIPTION
  The
  .Nm m4
  utility is a macro processor that can be used as a front end to any
  language (e.g., C, ratfor, fortran, lex, and yacc).
+ If no input files are given,
  .Nm m4
! reads from the standard input, otherwise the files from command line are
! processed in the given order.
! Input files can be regular files, files in the m4 include paths, or a
! single dash
! .Pq Sq - ,
! denoting standard input.
! .Nm m4
! writes
! the processed text to the standard output, unless told otherwise.
  .Pp
  Macro calls have the form name(argument1[, argument2, ..., argumentN]).
  .Pp