[src/trunk]: src/usr.bin/m4 Better document eval, mentioning optional second ...

[wiz <wiz%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/03cbf8e23469
branches:  trunk
changeset: 792557:03cbf8e23469
user:      wiz <wiz%NetBSD.org@localhost>
date:      Tue Jan 07 13:32:21 2014 +0000

description:
Better document eval, mentioning optional second and third arguments.
Requested by martin.
Bump date.

diffstat:

 usr.bin/m4/m4.1 |  12 +++++++-----
 1 files changed, 7 insertions(+), 5 deletions(-)

diffs (39 lines):

diff -r 62f7fe46d407 -r 03cbf8e23469 usr.bin/m4/m4.1
--- a/usr.bin/m4/m4.1   Tue Jan 07 13:14:39 2014 +0000
+++ b/usr.bin/m4/m4.1   Tue Jan 07 13:32:21 2014 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: m4.1,v 1.24 2013/07/20 21:40:00 wiz Exp $
+.\"    $NetBSD: m4.1,v 1.25 2014/01/07 13:32:21 wiz Exp $
 .\"    @(#) $OpenBSD: m4.1,v 1.56 2009/10/14 17:19:47 sthen Exp $
 .\"
 .\" Copyright (c) 1989, 1993
@@ -31,7 +31,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd October 14, 2009
+.Dd January 7, 2014
 .Dt M4 1
 .Os
 .Sh NAME
@@ -256,15 +256,17 @@
 Passes its first argument to a shell and returns the shell's standard output.
 Note that the shell shares its standard input and standard error with
 .Nm m4 .
-.It Fn eval expr
+.It Fn eval expr[,radix[,minimum]]
 Computes the first argument as an arithmetic expression using 32-bit
 arithmetic.
 Operators are the standard C ternary, arithmetic, logical,
 shift, relational, bitwise, and parentheses operators.
 You can specify
 octal, decimal, and hexadecimal numbers as in C.
-The second argument (if any)
-specifies the radix for the result and the third argument (if any)
+The optional second argument
+.Fa radix
+specifies the radix for the result and the optional third argument
+.Fa minimum
 specifies the minimum number of digits in the result.
 .It Fn expr expr
 This is an alias for