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It lacks date >> information, which can lead to misjudgment. So I added short author date >> to avoid this. This make it clear at a glance and reduce >> misunderstandings. > > How can it lead to misjudgment? If you have two or more hashes matching, do > you really think they'll have the same subjects? > > I do not plan on doing this. It's pointless. > > -- Steve While the addition of the date is a widely used variant within the git community, this was rejected by the kernel community in the past as well. I remember posting fixes tags with the date several years ago and getting push back. I tried to find reference to these discussions but I can't seem to locate them anymore on the archives. I personally find the date helpful as it can help place a commit without needing to take the extra time to do a lookup. However, all of the existing tooling we have for the kernel does not support the date, and I think its not worth trying to change it at this point. It doesn't make sense to break all this tooling for information which is accessible in other forms. Indeed, as long as the hash is sufficiently long, the change of a collision is minimal.