by Justin Filip.
That message is automatically generated and rarely ever edited.
If you're using Git from the commandline, run this to not see any merge commits in the history:
git log --no-merges
It will omit all of the log entries for merges from the activity log. That message shows a branch was merged into another one. The branch being merged in has it's own commits which would tell you what was done and are visible by looking for that Moodle issue tag:
git log --no-merges --grep MDL-12345