[Issue 16663] [REG 2.072] std.unit.toUpper rejects an alias this to a string

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16663

--- Comment #2 from Dicebot <public at dicebot.lv> ---
Nevermind, I have found my mistake. Can reproduce indeed.

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