* Semi-automated using `ssf-formula` (v0.5.0)
* Fix errors shown below:

```bash
apt-formula$ $(grep "\- yamllint" .travis.yml | sed -e "s:^\s\+-\s\(.*\):\1:")
pillar.example
  7:1       error    trailing spaces  (trailing-spaces)

test/salt/pillar/repositories.pillar.sls
  1:1       warning  missing document start "---"  (document-start)
  19:1      error    too many blank lines (1 > 0)  (empty-lines)

test/salt/pillar/preferences.pillar.sls
  1:1       warning  missing document start "---"  (document-start)
```