On Sat, 22 Jun 2019 23:56:11 +0000 Shawn Steele via Unicode <[email protected]> wrote:
> Assuming you were using any of those characters as "markup", how > would you know when they were intentionally in the string and not > part of your marking system? If they're conveying an invisible message, one would have to strip out original ZWNBSP/WJ/ZWSP that didn't affect line-breaking. The weak point is that that assumes that line-break opportunities are well-defined. For example, they aren't for SE Asian text. Richard.

