Add a link to install content_moderation when no workflow types are present

I'm surprised changing this text didn't cause a test fail, so maybe we need a test here.

Added Tests to verify if Content Moderation text is available as a link.

Nice work

This is a good UX improvement; I was wondering about this myself. Normally, we don't put any references to experimental modules in stable modules, but Content Moderation and Workflows are kind of a special case. And the user will get the necessary warnings about the beta module when they look into it.

+++ b/core/modules/workflows/src/WorkflowListBuilder.php
@@ -93,7 +93,7 @@ public function render() {
+      $build['table']['#empty'] = $this->t('There are no workflow types available. In order to create workflows you need to install a module that provides a workflow type. For example, the <a href=":content-moderation"> Content Moderation </a> module provides a workflow type that enables workflows for content entities.', [':content-moderation' => '/admin/modules#module-content-moderation']);

There should not be spaces around " Content Moderation " inside the <a> tag; just the space in the middle.

Removed space in the anchor tag text "Content Moderation"

Alright, thanks! Committed to 8.5.x. Since 8.4.x is in RC, per the D8 allowed changes policy, string changes should be committed to the next minor version, so I did not backport it. (This does not apply to experimental modules, but Workflows is now marked stable.) :)