I am not sure if this is a small bug or if this is "as designed". Close it if this is working as designed.


D2 code:

import std.stdio, std.conv, std.string;
void main() {
    auto a = [1, 2, 3];
    writeln(a);
    writefln("%s", a);
    writeln(text(a));
    writeln(format("%s", a));
}


The output given by DMD 2.059head:

[1, 2, 3]
[1, 2, 3]
[1, 2, 3]
[1,2,3]


I think writefln("%s") and format("%s") should give the same output. So I think here format("%s") should add a space after the comma.