Merge #21263: doc: Clarify that squashing should happen before review
fa1f3a26a7541ba82a28c2a5fd09401be825c888 doc: Clarify that squashing should happen before review (MarcoFalke)
Pull request description:
Unlike other repos, in our repo code review happens before merge, ideally.
Thus, rebases, solving merge conflicts and squashing should happen before review, which again happens before merge.
ACKs for top commit: