Add completion: order contestants by name + add email if present

app/models/contestant.rb

@@ -28,6 +28,14 @@ class Contestant < ApplicationRecord
   validates :name, presence: true
   validates :time_seconds, presence: true
 
+  def form_name
+    if email.present?
+      "#{name} - #{email}"
+    else
+      name
+    end
+  end
+
   private
 
   def initialize_time_seconds_if_empty