Rubocop'd!

.rubocop_todo.yml

@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2020-01-08 20:39:50 -0500 using RuboCop version 0.78.0.
+# on 2020-01-09 20:09:37 -0500 using RuboCop version 0.78.0.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new

cpi_fetcher.rb

@@ -21,7 +21,7 @@ class CPIFetcher
   def cpi_csv
     values = cpi
     CSV.generate do |csv|
-      csv << ['year', 'value']
+      csv << %w[year value]
       csv << [start_year, values.fetch(:start)]
       csv << [end_year, values.fetch(:latest)]
     end