As you can tell I work a bit with ansible. Once you get a few longer playbooks, or have to deploy to hundreds of hosts it can get a bit tedious to search through the output to find “ok, what changed?”
ARA can be a big help in such situations, but good old sed will also do nicely in a pinch: sed -n '/^--- before/,/^changed/p' ansible_output for bonus points you can pipe the output to colordiff