Function step3

test/WatchDetection.test.js:150–155

* @returns {void}

()

				 * @returns {void}
				 */
				function step3() {
					if (invalidate) watcher.invalidate();
					fs.writeFile(file2Path, "wrong", "utf8", handleError);

					setTimeout(step4, changeTimeout);
				}

				/**
				 * @returns {void}