[Issue 23400] [REG 2.099] Can't format enum value whose base type has non-const opEquals

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23400

--- Comment #1 from Paul Backus <snarwin+bugzilla at gmail.com> ---
PR: https://github.com/dlang/phobos/pull/8507

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