You're on assignment part 1/2 for this lesson.
"Rebase vs Merge" is one of the most hotly debated topics in the Git world. A lot of the discussions you'll see online come down to the fact that many developers (yes, even professionals) don't understand the purpose of rebase and use it incorrectly, causing a bunch of Git havoc, and then blame the rebase command.
It's not Git's fault, it's a skill issue.
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Say we have this commit history:
A - B - C main
\
D - E feature_branch
We're working on feature_branch, and want to bring in the changes our team added to main so we're not working with a stale branch. We could merge main into feature_branch, but that would create an additional merge commit. Rebase avoids a merge commit by replaying the commits from feature_branch on top of main. After a rebase, the history will look like this:
A - B - C main
\
D - E feature_branch