asset_paths should be an Array, is a String

any? is called on asset_paths, which is a string due to an early call to
join. asset_paths is joined together and passed to run a find command
on the remote target.

gems/capistrano-2.15.1/lib/capistrano/recipes/deploy.rb:299:in `block (2 levels) in load': undefined method `any?' for #<String:0x007f84838a1560> (NoMethodError)