Extra space displayed before and after login link inside the Info message when Email Validation is activated

Steps to reproduce

1. Login as Admin and configure Mail Sending on the instance
2. Go to Administer Wiki > Users & Rights > Registration and set "Use Email Verification" to 'Yes', then Save
3. Logout
4. Click 'Register' link and fill in the username, password and email for a new user
5. Click 'Register' button
6. Click 'Log-in' button
7. Go to the received email and click on the validation link
8. Inside the Info message displayed, observe the space before and after the 'login' link

Expected results

There is a single space before and after the 'login' link inside the Info message.

Actual results

There is much space displayed before and after the 'login' link.

The issue could not be reproduced on XWiki 16.8.0.