Let me give #2 for good commit messages a million upvotes. It's worthy of its own post. In fact, I recommend everybody read a good "how to write good commit messages" post, such as this one:
I will note, ironically, that your "good" example ends in a period. It's generally considered good form to not end your commit subject line with punctuation. But you should use proper punctuation in the body of the commit message. Yeah, we're a weird bunch. As such, I'm usually pretty forgiving about whether the first letter is capitalized, too, and just recommend that everyone follow the style of the project, which is good programming advice in general.
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Let me give #2 for good commit messages a million upvotes. It's worthy of its own post. In fact, I recommend everybody read a good "how to write good commit messages" post, such as this one:
chris.beams.io/posts/git-commit/
I will note, ironically, that your "good" example ends in a period. It's generally considered good form to not end your commit subject line with punctuation. But you should use proper punctuation in the body of the commit message. Yeah, we're a weird bunch. As such, I'm usually pretty forgiving about whether the first letter is capitalized, too, and just recommend that everyone follow the style of the project, which is good programming advice in general.