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From: Greg Wooledge <wooledg@eeg.ccf.org>
Newsgroups: gnu.bash.bug
Subject: Re: %q with truncating size loses safeness of %q
Date: Fri, 17 Apr 2020 20:03:15 -0400
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On Sat, Apr 18, 2020 at 05:37:52AM +0700, Robert Elz wrote:
> The end result is as Greg said, "Don't do that", if precisions are
> needed with %q do something like
> 
> 	printf 'echo %q%q\n' "$(printf %.2s "a'b")" ';ls'

Or something like   printf '%q\n' "${myvar:0:2}"
since I would assume the content to be truncated-and-quoted is in a
variable.