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Denote multiple arguments with 'arg ...' not 'args'

A few programs used the plural in their synopsis which doesn't read as
clear as the obvious triple-dot notation.

mdoc(7) .Ar defaults to "file ..." if no arguments are given and consistent
use of 'arg ...' matches that behaviour.

Cleanup a few markups of the same argument so the text keeps reading
naturally;  omit unhelpful parts like 'if optional arguments are given,
they are passed along' for tools like time(1) and timeout(1) that obviously
execute commands with whatever arguments where given -- just like doas(1)
which doesn't mention arguments in its DESCRIPTION in the first place.

For expr(1) the difference between 'expressions' and 'expression ...' is
crucial, as arguments must be passed as individual words.

Feedback millert jmc schwarze deraadt
OK jmc

.\"	$OpenBSD: time.1,v 1.22 2022/12/22 19:53:23 kn Exp $
.\"	$NetBSD: time.1,v 1.5 1994/12/08 09:36:57 jtc Exp $
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.\"     @(#)time.1	8.1 (Berkeley) 6/6/93
.\"
.Dd $Mdocdate: December 22 2022 $
.Dt TIME 1
.Os
.Sh NAME
.Nm time
.Nd time command execution
.Sh SYNOPSIS
.Nm time
.Op Fl lp
.Ar utility
.Op Ar argument ...
.Sh DESCRIPTION
.Nm
executes and times
.Ar utility .
After the
.Ar utility
finishes,
.Nm
writes the total time elapsed,
the time consumed by system overhead,
and the time used to execute
.Ar utility
to the standard error stream.
Times are reported in seconds.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl l
The contents of the
.Em rusage
structure are printed.
.It Fl p
The output is formatted as specified by
.St -p1003.2-92 .
.El
.Sh FILES
.Bl -tag -width /usr/include/sys/resource.h -compact
.It Pa /usr/include/sys/resource.h
.El
.Sh EXIT STATUS
The
.Nm
utility exits with one of the following values:
.Pp
.Bl -tag -width indent -compact
.It 1\-125
An error occurred in the
.Nm
utility.
.It 126
The
.Ar utility
was found but could not be invoked.
.It 127
The
.Ar utility
could not be found.
.El
.Pp
Otherwise, the exit status of
.Nm
shall be that of
.Ar utility .
.Sh SEE ALSO
.Xr csh 1 ,
.Xr ksh 1 ,
.Xr getrusage 2
.Sh STANDARDS
The
.Nm
utility is compliant with the
.St -p1003.1-2008
specification.
.Pp
The flag
.Op Fl l
is an extension to that specification.
.Pp
.Nm
also exists as a built-in to
.Xr csh 1
and
.Xr ksh 1 ,
though with a different syntax.
.Sh HISTORY
A
.Nm
command appeared in
.At v3 .