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diff --git a/lib/libc/gen/isinf.3 b/lib/libc/gen/isinf.3
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--- a/lib/libc/gen/isinf.3
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@@ -1,82 +0,0 @@
-.\"    $OpenBSD: isinf.3,v 1.12 2007/05/31 19:19:28 jmc Exp $
-.\"
-.\" Copyright (c) 1991, 1993
-.\"    The Regents of the University of California.  All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.Dd $Mdocdate: May 31 2007 $
-.Dt ISINF 3
-.Os
-.Sh NAME
-.Nm isinf ,
-.Nm isinff ,
-.Nm isnan ,
-.Nm isnanf
-.Nd test for infinity or not-a-number
-.Sh SYNOPSIS
-.Fd #include <math.h>
-.Ft int
-.Fn isinf "double n"
-.Ft int
-.Fn isinff "float n"
-.Ft int
-.Fn isnan "double n"
-.Ft int
-.Fn isnanf "float n"
-.Sh DESCRIPTION
-The
-.Fn isinf
-function returns 1 if the number
-.Fa n
-is \*(If, otherwise 0.
-The
-.Fn isinff
-function is a single precision version of
-.Fn isinf .
-.Pp
-The
-.Fn isnan
-function returns 1 if the number
-.Fa n
-is
-.Dq not-a-number ,
-otherwise 0.
-The
-.Fn isnanf
-function is a single precision version of
-.Fn isnan .
-.Sh SEE ALSO
-.Xr math 3
-.Rs
-.%T "IEEE Standard for Binary Floating-Point Arithmetic"
-.%Q ANSI
-.%R Std 754-1985
-.Re
-.Sh BUGS
-.Tn VAX
-floating point does not have distinguished values
-for either infinity or not-a-number.
-These routines always return 0 on that architecture.