[Issue 21666] wrong printf format specifier for `real` with -checkaction=context on Win64

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21666

--- Comment #4 from Dlang Bot <dlang-bot at dlang.rocks> ---
dlang/druntime pull request #3398 "Merge stable" was merged into master:

- 0d7ec8010fffba3ff002f750955e7f8db8e96089 by MoonlightSentinel:
  Fix 21666 - Remove deprecations w.r.t. real formatting for...

  ...checkaction=context. These deprecations are issued when
  `real.sizeof = double.sizeof`.

  This is a workaround for https://issues.dlang.org/show_bug.cgi?id=20759.

https://github.com/dlang/druntime/pull/3398

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