I'm trying to pipe a url to a channel and it always ends up formatted with backticks. For example: ``` echo "http://github.com" | slack chat send -ch @mark ``` I receive the message but it looks like this: <img width="698" alt="image" src="https://user-images.githubusercontent.com/917632/64351085-b5f9cf80-cfc7-11e9-9095-882a6a09ba0f.png"> Is there a way to format piped output?