Re: document that read built-in can't return zero-length string in the middle of input

[Robert Elz]

    Date:        Thu, 11 Jan 2024 20:02:04 -0500
    From:        Greg Wooledge <greg@wooledge.org>
    Message-ID:  <ZaCPjAscvwrwurcJ@wooledge.org>

  | What actually counts is how many
  | characters are *stored* in the variable, not how many characters are
  | *read* from the input.

I suspect that is the root of the issue here, you're considering
the word "read" to mean read(2) whereas as it is in the documentation
for the read command, I suspect it means that one, how many characters
the read command obtains, rather than how many the read system call
processes (like elided newlines. when -r is not used, would also not
be counted, or expected to be, right?)

kre