lint fix

Author: taru-garg-hashicorp

lib/vagrant/action/builtin/box_add.rb

@@ -179,10 +179,10 @@ def add_direct(urls, env)
           if env[:box_version]
             raise Errors::BoxAddDirectVersion
           end
-
           provider = env[:box_provider]
-          
+
           provider = Array(provider) if provider
+          
           box_add(
             urls,
             name,