old_contents: //= require analytics/events-cookie-handler
  //= require analytics/tracking-strategies
  //= require analytics/tracking
  //= require analytics/print-tracking
  //= require analytics/print-intent
  //= require analytics/scroll-tracker
  
new_contents: //= require analytics/events-cookie-handler
  //= require analytics/tracking-strategies
  //= require analytics/tracking
  //= require analytics/print-tracking
  //= require analytics/print-intent
  //= require analytics/scroll-tracker
  //= require analytics/error-tracking
  
subject: Add error-tracking to analytics asset pipeline