Allow to pass metadata to example_request

@@ -528,8 +528,8 @@ resource "Account" do
 expect(status).to eq 404
 end
 
-# With example_request, you can't change the :document
-example_request "Get a list on page 3", :page => 3 do
+# With example_request, you can change the :document via metadata
+example_request "Get a list on page 3", :page => 3, :metadata => {:document => false} do
 expect(status).to eq 404
 end
 end
@@ -658,6 +658,13 @@ resource "Orders" do
 end
 ```
 
+For passing metadata to example_request you can use param named `:metadata`
+```ruby
+example_request "Creating an order", :name => "Other name", metadata: {document: :private} do
+# make assertions
+end
+```
+
 #### explanation
 
 This method takes a string representing a detailed explanation of the example.