lib/reporters/tap.js
function println(format, varArgs) {
  var vargs = Array.from(arguments);
  vargs[0] += '\n';
  process.stdout.write(sprintf.apply(null, vargs));
}
function println(format, varArgs) {
  var vargs = Array.from(arguments);
  vargs[0] += '\n';
  process.stdout.write(sprintf.apply(null, vargs));
}
function println ( format , varArgs ) { var vargs = Array . from ( arguments ) ; vargs [ 0 ] += '\n' ; process . stdout . write ( sprintf . apply ( null , vargs ) ) ; }
Writes newline-terminated formatted string to reporter output stream.

@private
@param {string} format - `printf`-like format string
@param {...*} [varArgs] - Format string arguments
Writes newline - terminated formatted string to reporter output stream .