old_contents: var installer = require('./../index.js');
  
  const PACKAGE_NAME = "test-package";
  
  installer.install(__dirname, PACKAGE_NAME, function(err, dir) {
  	if (err) {
  		console.error(err);
  		console.log("The most common reason for this is running the test from outside of a Unity project folder.");
  		process.exit(1);
  	}
  
  	console.log("Test success! Installed " + PACKAGE_NAME + " to: " + dir);
  });
new_contents: var installer = require('./../index.js');
  
  const PACKAGE_NAME = "test-package";
  
  installer.install(__dirname, PACKAGE_NAME, function(err, dir) {
  	if (err) {
  		console.error(err);
  		console.log("The most common reason for this is running the test from outside of a Unity project folder.");
  		process.exit(1);
  	}
  
  	console.log(`Test success! Installed ${PACKAGE_NAME} to: ${dir}`);
  });
  
subject: update test to use format string