Issue #1987400 by joelpittet, andypost, drupalninja99, jerdavis, CaptainWonky, shanethehat, TrevorBradley | Cottser: Forum.module - Convert theme_ functions to Twig.

Issue #2080607 by CaptainWonky, mrsinguyen: Remove Unused local variable  from /core/modules/user/lib/Drupal/user/Tests/Views/HandlerFieldRoleTest.php.