Break long arrays to multiline. We have a kind-of restriction of 120 character line length.
```ruby
default['rs-cookbooks-ci']['jenkins']['server']['plugins'] = [
  "ssh-credentials",
  "ssh-slaves",
  "ssh-agent",
  "git-client",
  "github-api",
  "git",
  "github",
  "ansicolor"
]
```