docs(guide/unit-testing): use whitespace to improve readability
docs(guide/unit-testing): use whitespace to improve readability

☆.。.：・゜☆ Merci (◜௰◝) ☆.。.：・゜☆

Closes #9572

ggershoni/angular.js,ggershoni/angular.js,ggershoni/angular.js,ggershoni/angular.js