```ruby
require 'active_support/deprecation'

ActiveSupport::Deprecation.warn("ActionDispatch::Assertions::TagAssertions has been has been extracted to the rails-dom-testing gem.")
```

Remove extra 'has been' from the deprecation message
user
```ruby
require 'active_support/deprecation'

ActiveSupport::Deprecation.warn("ActionDispatch::Assertions::TagAssertions has been extracted to the rails-dom-testing gem.")
```
assistant