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

[via Digitalmars-d-bugs]

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

--- Comment #4 from Jack Stouffer <jack at jackstouffer.com> ---
(In reply to Jack Stouffer from comment #3)
> 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.

Scratch that. Someone thought ahead and there's a function in std.format for
this. Fix soon

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