[Feature Request] Better rendering for check hooks

[majormoses]

This technically belongs in uchiwa-web but it only accepts PRs and not issues.

Currently this is what a check hook looks like in uchiwa:

It would be nice if the output was split on newlines and formatted for easier reading.

In the pagerduty console the same data is rendered like this:

The easiest way I can think of is to split the output key on "\n" into an array but I am sure there are other things that could be done to make this more shiny.