Problem/Motivation
Replace use of whitelist/blacklist in \Drupal\Component\Utility\Xss and its test and core/lib/Drupal/Core/Render/theme.api.php
They are:
- An historic bad labelling of people
- Provide no context: "what is listed in them"?
Proposed resolution
TBD
Remaining tasks
User interface changes
None
API changes
@todo
Data model changes
@todo
Release notes snippet
@todo