[PATCH v1b] isalpha.3: Move NOTES to CAVEATS, and clarify some Undefined Behavior

[Alejandro Colomar <alx.manpages@gmail.com>]

Reported-by: Yedidyah Bar David <didi@redhat.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>
---

I suggest this instead.

 man3/isalpha.3 | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/man3/isalpha.3 b/man3/isalpha.3
index 000e816d7..721ca8972 100644
--- a/man3/isalpha.3
+++ b/man3/isalpha.3
@@ -345,13 +345,15 @@ .SH HISTORY
 .TP
 .BR isascii_l ()
 glibc 2.3.
-.SH NOTES
+.SH CAVEATS
 The standards require that the argument
 .I c
 for these functions is either
 .B EOF
 or a value that is representable in the type
-.IR "unsigned char" .
+.IR "unsigned char" ;
+otherwise,
+the behavior is undefined.
 If the argument
 .I c
 is of type
-- 
2.40.1