[swift-evolution] Allowing trailing commas in argument lists

[Joe Groff]

> On Mar 10, 2016, at 1:29 PM, Radosław Pietruszewski via swift-evolution <swift-evolution at swift.org> wrote:
> 
>> In working with many programming languages since
>> ca. 1980, there was not even one language offering this, 
>> and I am an experienced programmer. 
> 
> Ruby, JavaScript, CoffeeScript, Swift.

Perl accepted trailing commas before it was cool.

-Joe