Dear Maintainer,
isgraph(3):
isgraph()
checks for any printable character except space.
od(1):
-S BYTES, --strings[=BYTES]
output strings of at least BYTES graphic chars; 3 is implied when BYTES is not specified
$ printf 'a b\0' | od -S3
0000000 a b
?
наб
This isn't specified by POSIX, so let's match the docs to the operation. Done upstream in the attached. cheers, Pádraig