When we asked our participants about how to automatically detect such unexpected events, several examples were mentioned, in particular related to the commit history: “Commits that take particularly long might be interesting. If a developer hasn’t committed anything in a while, his first commit after a long silence could be particularly interesting, for example because it took him a long time to fix a bug. Also, important commits might have unusual commit messages, for example including smileys, lots of exclamation marks, or something like that…basically something indicating that the developer
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