Any reason template string with empty interpolation placeholder (`${}`) throws?

[Jason Orendorff]

On Thu, Oct 22, 2015 at 7:34 PM, Caitlin Potter <caitpotter88 at gmail.com> wrote:
> Okay, but usability wise, this kind of sucks. There's a reason it's not what
> people expect, and why other languages with string interpolation behave
> differently.

Perl and bash both treat "${}" as a syntax error. So does Python's
string.Template().

I think it would be a mistake to sweep this kind of situation under
the rug. Pointing out a place where the programmer started to type
something but then never finished it seems like a good thing.

-j