Fix Rubocop offenses

lib/query.rb

@@ -7,6 +7,7 @@ class Query
 
   def amount
     return unless @params[:amount]
+
     @params[:amount].to_f
   end
 

lib/quote/end_of_day.rb

@@ -14,6 +14,7 @@ module Quote
 
     def cache_key
       return if not_found?
+
       Digest::MD5.hexdigest(result.keys.first)
     end
 

lib/quote/interval.rb

@@ -15,6 +15,7 @@ module Quote
 
     def cache_key
       return if not_found?
+
       Digest::MD5.hexdigest(result.keys.last)
     end