Except they did both: `\{` is not currently valid, so the "explicit function / constructor call" is completely unnecessary. Furthermore, they went on to use a

Except they did both: `\{` is not currently valid, so the "explicit function / constructor call" is completely unnecessary. Furthermore, they went on to use a printf-style formatting spec prefixing the template leader. > Advantage of 2 is that it doesn't require any new support from IDEs/parsers/code quality tools/etc. Of course it does, the sequence "IDENTIFIER, PERIOD, STRING LITERAL" is currently invalid, anything beyond a tokeniser should choke on it.