Breadcrumb for Message Board Subscriptions displays extra '/'

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.0 M3
• Fix Version/s: 7.0.0 M4
• Component/s: Collaboration, Collaboration > Message Boards > Subscription Manager
• Labels: None
• Fix Priority: 1
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/23333

Subscription view displays an extra / for dividing subcategories.

Steps to reproduce

1. Add Message Board Portlet
2. Add Category
3. Add Subcategory 1 under Category 1
4. Add Subcategory 2 under Subcategory 1
5. Add Subcategory 3 under Subcategory 2
6. Subscribe to subcategory 3
7. Go to My Subscriptions
8. Under category, assert extra '/' displays in the breadcrumb for the category.

Expected Result:
Subscribed categories display and have a breadcrumb.

Actual Result:
Subscribed category displays but the breadcrumb displays extra '/' lines.

This issue was not duplicated in 6.2.x.