Slightly refactor/comment the harness for clarity.

5 jobs for fix-harness-double-free in 2 minutes and 31 seconds (queued for 26 seconds)
Status Job ID Name Coverage
  Build
passed build:lib #13568
docker

00:01:37

 
  Test
passed test:lib #13569
docker

00:00:54

 
  Trigger
passed trigger:android

passed trigger:javascript

passed trigger:python