DIP 1027---String Interpolation---Community Review Round 1

[Adam D. Ruppe]

On Sunday, 15 December 2019 at 17:26:57 UTC, Jab wrote:
> It being usable with snprintf() means it outputs something that 
> pretty much no other function uses.

D's writef uses it too, as well as std.format. Do do the vibe 
logging functions.

It is a common format.

(though D's writef is supposed to replace C's printf... for great 
part because of type safety.))