doc: add missing new lines to custom test reporter examples

PR-URL: #54152
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>
Reviewed-By: Harshitha K P <harshitha014@gmail.com>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Jake Yuesong Li <jake.yuesong@gmail.com>

Author: EddieAbbondanzio

doc/api/test.md

@@ -1047,13 +1047,13 @@ export default async function * customReporter(source) {
 forawait (consteventofsource) {
 switch (event.type) {
 case'test:dequeue':
-yield`test ${event.data.name} dequeued`;
+yield`test ${event.data.name} dequeued\n`;
 break;
 case'test:enqueue':
-yield`test ${event.data.name} enqueued`;
+yield`test ${event.data.name} enqueued\n`;
 break;
 case'test:watch:drained':
-yield'test watch queue drained';
+yield'test watch queue drained\n';
 break;
 case'test:start':
 yield`test ${event.data.name} started\n`;
@@ -1065,7 +1065,7 @@ export default async function * customReporter(source) {
 yield`test ${event.data.name} failed\n`;
 break;
 case'test:plan':
-yield'test plan';
+yield'test plan\n';
 break;
 case'test:diagnostic':
 case'test:stderr':
@@ -1087,13 +1087,13 @@ module.exports = async function * customReporter(source) {
 forawait (consteventofsource) {
 switch (event.type) {
 case'test:dequeue':
-yield`test ${event.data.name} dequeued`;
+yield`test ${event.data.name} dequeued\n`;
 break;
 case'test:enqueue':
-yield`test ${event.data.name} enqueued`;
+yield`test ${event.data.name} enqueued\n`;
 break;
 case'test:watch:drained':
-yield'test watch queue drained';
+yield'test watch queue drained\n';
 break;
 case'test:start':
 yield`test ${event.data.name} started\n`;