added save routing

app/controllers/candidate_controller.rb

@@ -9,8 +9,7 @@ class CandidateController < ApplicationController
   end
 
   def update_question
-
-    redirect_to saved_path if params[:submit] == 'Save'
+    redirect_to :saved and return if params[:save] == 'Save'
     redirect_to :question
   end
 
@@ -26,4 +25,10 @@ class CandidateController < ApplicationController
   def validate
     redirect_to :question
   end
+
+  private
+
+    def question_params
+      params.permit(:save)
+    end
 end