more precision because the argument is signed,

and even char is signed on some platforms;
OK millert@ jmc@

diff --git a/lib/libc/gen/isascii.3 b/lib/libc/gen/isascii.3
index bf39104..8df4f24 100644 (file)
--- a/lib/libc/gen/isascii.3
+++ b/lib/libc/gen/isascii.3
@@ -1,4 +1,4 @@
-.\"    $OpenBSD: isascii.3,v 1.14 2021/06/12 16:53:28 jmc Exp $
+.\"    $OpenBSD: isascii.3,v 1.15 2021/06/29 16:34:52 schwarze Exp $
 .\"
 .\" Copyright (c) 1989, 1991 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: June 12 2021 $
+.Dd $Mdocdate: June 29 2021 $
 .Dt ISASCII 3
 .Os
 .Sh NAME
@@ -41,7 +41,7 @@
 The
 .Fn isascii
 function tests for an ASCII character,
-which is any character with a value less than or equal to 0177.
+which is any character in the range from 0 to 0177, inclusive.
 .Sh RETURN VALUES
 The
 .Fn isascii