String Interpolation

[djent]

Much like the entrepreneur, the language designer is tasked with 
the difficult job of predicting what users would want in contrast 
with what they currently have and expect. This is how innovation 
materializes.

After giving Adam's implementation a spin, I'm convinced this is 
the proper way to move forward despite not having conceived it as 
a possibility beforehand. It's powerful, exploiting D's superior 
metaprogramming and DBI capabilities, but doesn't stray too far 
from the current situation found in many languages in that one 
can just use `text` or something similar if a plain string is 
required.

I anticipate the worst solution will win out given Walter's 
disposition, but I nonetheless hope for the best.