correct articles

including 'an NaN' -> 'a NaN', matching use in c99 and ieee 754
ok millert@ deraadt@

lib/libc/gen/signal.3

@@ -1,4 +1,4 @@
-.\"	$OpenBSD: signal.3,v 1.59 2024/07/14 03:47:44 jsg Exp $
+.\"	$OpenBSD: signal.3,v 1.60 2025/10/14 06:30:16 jsg Exp $
 .\"
 .\" Copyright (c) 1980, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -27,7 +27,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: July 14 2024 $
+.Dd $Mdocdate: October 14 2025 $
 .Dt SIGNAL 3
 .Os
 .Sh NAME
@@ -218,7 +218,7 @@ The affected system calls include
 and
 .Xr recvmsg 2
 on a communications channel or a low-speed device
-and during a
+and during an
 .Xr ioctl 2
 or
 .Xr wait 2 .

lib/libc/yp/yp_bind.3

@@ -1,4 +1,4 @@
-.\"	$OpenBSD: yp_bind.3,v 1.2 2020/12/03 22:47:21 jmc Exp $
+.\"	$OpenBSD: yp_bind.3,v 1.3 2025/10/14 06:30:16 jsg Exp $
 .\"
 .\" Copyright (c) 1996 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -27,7 +27,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: December 3 2020 $
+.Dd $Mdocdate: October 14 2025 $
 .Dt YP_BIND 3
 .Os
 .Sh NAME
@@ -248,7 +248,7 @@ Holds one of the return status values described in
 .In rpcsvc/yp_prot.h :
 see
 .Fn ypprot_err
-below for a function that will translate YP protocol errors into a
+below for a function that will translate YP protocol errors into an
 error code as described in
 .In rpcsvc/ypclnt.h .
 .It Fa inkey , inval

lib/libm/man/fdim.3

@@ -1,4 +1,4 @@
-.\"	$OpenBSD: fdim.3,v 1.4 2025/06/07 10:33:06 schwarze Exp $
+.\"	$OpenBSD: fdim.3,v 1.5 2025/10/14 06:30:16 jsg Exp $
 .\"
 .\" Copyright (c) 2004 David Schultz <das@FreeBSD.org>
 .\" All rights reserved.
@@ -26,7 +26,7 @@
 .\"
 .\" $FreeBSD: src/lib/msun/man/fdim.3,v 1.1 2004/06/30 07:04:01 das Exp $
 .\"
-.Dd $Mdocdate: June 7 2025 $
+.Dd $Mdocdate: October 14 2025 $
 .Dt FDIM 3
 .Os
 .Sh NAME
@@ -62,7 +62,7 @@ If either
 .Fa x
 or
 .Fa y
-is an NaN, then an NaN is returned.
+is a NaN, then a NaN is returned.
 Otherwise, the result is
 .Li +0.0 .
 .Pp

lib/libm/man/fmax.3

@@ -1,4 +1,4 @@
-.\"	$OpenBSD: fmax.3,v 1.5 2025/06/13 18:34:00 schwarze Exp $
+.\"	$OpenBSD: fmax.3,v 1.6 2025/10/14 06:30:16 jsg Exp $
 .\"
 .\" Copyright (c) 2004 David Schultz <das@FreeBSD.org>
 .\" All rights reserved.
@@ -26,7 +26,7 @@
 .\"
 .\" $FreeBSD: src/lib/msun/man/fmax.3,v 1.2 2005/01/14 09:12:05 ru Exp $
 .\"
-.Dd $Mdocdate: June 13 2025 $
+.Dd $Mdocdate: October 14 2025 $
 .Dt FMAX 3
 .Os
 .Sh NAME
@@ -75,8 +75,8 @@ They treat
 .Li +0.0
 as being larger than
 .Li -0.0 .
-If one argument is an NaN, then the other argument is returned.
-If both arguments are NaNs, then the result is an NaN.
+If one argument is a NaN, then the other argument is returned.
+If both arguments are NaNs, then the result is a NaN.
 These routines do not raise any floating-point exceptions.
 .Sh SEE ALSO
 .Xr fabs 3 ,

usr.sbin/authpf/authpf.8

@@ -1,4 +1,4 @@
-.\" $OpenBSD: authpf.8,v 1.56 2022/02/18 23:17:16 jsg Exp $
+.\" $OpenBSD: authpf.8,v 1.57 2025/10/14 06:30:16 jsg Exp $
 .\"
 .\" Copyright (c) 1998-2007 Bob Beck (beck@openbsd.org>.  All rights reserved.
 .\"
@@ -14,7 +14,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: February 18 2022 $
+.Dd $Mdocdate: October 14 2025 $
 .Dt AUTHPF 8
 .Os
 .Sh NAME
@@ -240,8 +240,8 @@ should be configured to use the
 .Ar ClientAliveInterval
 and
 .Ar ClientAliveCountMax
-parameters to ensure that a ssh session is terminated quickly if
-it becomes unresponsive, or if arp or address spoofing is used to
+parameters to ensure that an SSH session is terminated quickly if
+it becomes unresponsive, or if ARP or address spoofing is used to
 hijack the session.
 Note that TCP keepalives are not sufficient for
 this, since they are not secure.