import { isprint } from "https://deno.land/x/denops_std@v5.1.0/option/mod.ts";
The characters given by this option are displayed directly on the
screen. It is also used for "\p" in a pattern. The characters from
space (ASCII 32) to '~' (ASCII 126) are always displayed directly,
even when they are not included in 'isprint' or excluded. See
'isfname' for a description of the format of this option.
Non-printable characters are displayed with two characters:
0 - 31 "@" - "_"
32 - 126 always single characters
127 "^?"
128 - 159 "~@" - "~_"
160 - 254 "| " - "|~"
255 "~?"
When 'encoding' is a Unicode one, illegal bytes from 128 to 255 are
displayed as <xx>, with the hexadecimal value of the byte.
When 'display' contains "uhex" all unprintable characters are
displayed as <xx>.
The SpecialKey highlighting will be used for unprintable characters.
hl-SpecialKey
Multi-byte characters 256 and above are always included, only the
characters up to 255 are specified with this option. When a character
is printable but it is not available in the current font, a
replacement character will be shown.
Unprintable and zero-width Unicode characters are displayed as <xxxx>.
There is no option to specify these characters.
(default for Win32 and macOS:
"@,~-255"; otherwise: "@,161-255")