PrettifyLevel

Sass2scss libsass plugin option specifier. It consists of:

1. Write everything on one line (minimized)
2. Add lf after opening bracket (lisp style)
3. Add lf after opening and before closing bracket (1TBS style)
4. Add lf before/after opening and before closing (allman style)

More information can be found in the https://github.com/mgreter/sass2scss, official documentation.