Fix Issue 24550 - - formattedWrite should support string interpolation

[RubyTheRoobster]

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Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	24550	enhancement	formattedWrite should support string interpolation

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + phobos#9041"

[thewilsonator]

please retitle the commit message "Fix Bugzliia Issue 24550 - - formattedWrite should support string interpolation"

[RubyTheRoobster]

BuildKite seems to be failing because it doesn't properly recognize string interpolation syntax.

[pbackus]

My understanding is that the "formatted" part of formattedWrite refers to the format string. If it's using interpolation, it's not really a "formatted" write, is it?

[LightBender]

@RubyTheRoobster I agree with @pbackus that these methods are for format-strings and not IES strings. As such, I am going to close this PR, but if you think this is an error, please feel free to reopen it.