Add rubocop spacing rules

We were following these rules in most places; we just didn't define them
anywhere.

app/helpers/valuation_helper.rb

@@ -6,11 +6,11 @@ module ValuationHelper
 
   def valuator_select_options
     Valuator.order("description ASC").order("users.email ASC").includes(:user).
-             collect { |v| [ v.description_or_email, "valuator_#{v.id}"] }
+             collect { |v| [v.description_or_email, "valuator_#{v.id}"] }
   end
 
   def valuator_group_select_options
-    ValuatorGroup.order("name ASC").collect { |g| [ g.name, "group_#{g.id}"] }
+    ValuatorGroup.order("name ASC").collect { |g| [g.name, "group_#{g.id}"] }
   end
 
   def assigned_valuators_info(valuators)