test: replace string concatenation with template literals
from Workshop Code + Learn replace string concatenation in test/parallel/test-require-extensions-same-filename-as-dir.js with template literals.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
from Workshop Code + Learn replace string concatenation in test/parallel/test-require-extensions-same-filename-as-dir.js with template literals.