Update usage.html.md
Update usage.html.md

Show a `before` and an `after`.
sni/vagrant,marxarelli/vagrant,gitebra/vagrant,mitchellh/vagrant,chrisroberts/vagrant,gitebra/vagrant,bryson/vagrant,marxarelli/vagrant,chrisroberts/vagrant,bryson/vagrant,gitebra/vagrant,crashlytics/vagrant,mitchellh/vagrant,mitchellh/vagrant,chrisroberts/vagrant,crashlytics/vagrant,sni/vagrant,crashlytics/vagrant,gitebra/vagrant,marxarelli/vagrant,chrisroberts/vagrant,sni/vagrant,bryson/vagrant,bryson/vagrant,marxarelli/vagrant,crashlytics/vagrant,sni/vagrant,mitchellh/vagrant