convert one-line dictionary to multi-line for sendmail.yml
convert one-line dictionary to multi-line for sendmail.yml

seankelly/buildbot-infra,buildbot/buildbot-infra,ewongbb/buildbot-infra,djmitche/buildbot-infra,seankelly/buildbot-infra,djmitche/buildbot-infra,seankelly/buildbot-infra,ewongbb/buildbot-infra,djmitche/buildbot-infra,buildbot/buildbot-infra,buildbot/buildbot-infra