Allow foo_path(foo) even with :locale prefix in routes in Rails 4.

patch_rails_i18n_routing_positional_arguments.rb

unless Rails::VERSION::STRING == "4.0.0"
  raise "Rails version changed. Revisit overrides and make sure they're still good!"
end

# If routes are prefixed with a :locale, you can no longer do
# `foo_path(foo)` but only `foo_path(id: foo)`, since it expects
# the first of any non-hash arguments to be the locale.
# This monkeypatch fixes that by never allowing locale as the first
# non-hash argument

module HandlePositionalArgsWithLocalePrefix
  def handle_positional_args(t, args, options, keys)
    if keys && keys[0] == :locale
      keys << keys.shift
    end
    super
  end
end

module ActionDispatch
  module Routing
    class RouteSet
      class NamedRouteCollection
        class UrlHelper
          prepend HandlePositionalArgsWithLocalePrefix
        end
      end
    end
  end
end