[Issue 22473] dmd foreach loops throw exceptions on invalid UTF sequences, use replacementDchar instead

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22473

--- Comment #3 from Walter Bright <bugzilla at digitalmars.com> ---
Ali, you're right. I can't believe I made that mistake. I was even thinking
about not making that mistake when I wrote the example.

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