in app/lib/Responsibility.scala [21:26]
def createdByAndMergedByFor(pr: PullRequest): String = {
val mergedByOpt = pr.merged_by
val mergedByText = s"merged by ${mergedByOpt.get.atLogin}"
if (pr.user.id == mergedByOpt.get.id) mergedByText else s"created by ${pr.user.atLogin} and $mergedByText"
}