anchor.diff:      tags: ["foo", "bar"]
   
   namespaces:
  -  - name: app-1
  +  - name: app1
       format: "$remote_addr - $remote_user [$time_local] \"$request\" $status $body_bytes_sent \"$http_referer\" \"$http_user_agent\" \"$http_x_forwarded_for\""
       source_files:
         - /var/log/nginx/app1/access.log
  
positive.code:   }
  }
  
  namespace "app-2" {
    format = "$remote_addr - $remote_user [$time_local] \"$request\" $status $body_bytes_sent \"$http_referer\" \"$http_user_agent\" \"$http_x_forwarded_for\" $upstream_response_time"
    source_files = [
      "/var/log/nginx/app2/access.log"
  
negative.code:   }
  }
  
  namespace "app1" {
    format = "$remote_addr - $remote_user [$time_local] \"$request\" $status $body_bytes_sent \"$http_referer\" \"$http_user_agent\" \"$http_x_forwarded_for\""
    source_files = [
      "/var/log/nginx/app1/access.log"
  