[Issue 16108] `to!string` fails on struct with disabled postblit

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16108

--- Comment #3 from Jack Stouffer <jack at jackstouffer.com> ---
Hmm, fixing this has me down a rabbit hole.

to!string relies on std.format for all conversions of aggregate types, and all
of std.format copies as well. This is going to be a very ugly PR.

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