```ruby
rss_activity_feed :root_url => projects_url do |feed|
  for activity in @activities
    feed.entry activity
  end
end
```

Solve RSS bug for activities without a target
user
```ruby
rss_activity_feed :root_url => projects_url do |feed|
  for activity in @activities
    feed.entry activity if activity.target
  end
end
```
assistant