Variant negotiation

Allow setting `request.variant` as an array - an order in which they will be
rendered.

For example:

  request.variant = [:tablet, :phone]

  respond_to do |format|
    format.html.none
    format.html.phone # this gets rendered
  end

1 files changed, 1 insertions, 1 deletions

diff --git a/actionview/lib/action_view/rendering.rb b/actionview/lib/action_view/rendering.rb
index 99b95fdfb7..7c17220d14 100644
--- a/actionview/lib/action_view/rendering.rb
+++ b/actionview/lib/action_view/rendering.rb
@@ -94,7 +94,7 @@ module ActionView
         variant = options[:variant]
 
         lookup_context.rendered_format = nil if options[:formats]
-        lookup_context.variants = [variant] if variant
+        lookup_context.variants = variant if variant
 
         view_renderer.render(view_context, options)
       end