```ruby
require 'growl'

Growl.notify {
  self.message = "<a href='http://www.google.com'>This is a test!</a>"
  self.icon = :Safari
  sticky!
}
```

Add url to growl test file; update code
user
```ruby
require 'rubygems'
require 'bundler/setup'

require 'growl'

notify = Growl.new
notify.title = "Hello, World!"
notify.message = "This is a message to you!"
notify.url = "https://google.com"

notify.run
```
assistant