Use a default for flash_now, enabling it to be set to false.

The previous behavior to never set flash.now can now be used again.

lib/responders/flash_responder.rb

@@ -85,7 +85,7 @@ def initialize(controller, resources, options={})
       @flash     = options.delete(:flash)
       @notice    = options.delete(:notice)
       @alert     = options.delete(:alert)
-      @flash_now = options.delete(:flash_now) || :on_failure
+      @flash_now = options.delete(:flash_now) { :on_failure }
     end
 
     def to_html

test/flash_responder_test.rb

@@ -30,6 +30,11 @@ def another
     respond_with(@resource, :notice => "Yes, notice this!", :alert => "Warning, warning!")
   end
 
+  def flexible
+    options = params[:responder_options] || {}
+    respond_with(@resource, options)
+  end
+
   protected
 
   def interpolation_options
@@ -140,6 +145,12 @@ def test_sets_flash_now_on_failure_by_default
     assert_flash_now :alert
   end
 
+  def test_never_set_flash_now
+    post :flexible, :fail => true, :responder_options => { :flash_now => false, :alert => "Warning" }
+    assert flash[:alert].present?, "Flash should be present"
+    assert_not_flash_now :alert
+  end
+
   # If we have flash.now, it's always marked as used.
   def assert_flash_now(k)
     assert flash.instance_variable_get(:@used).include?(k.to_sym),