Easy and fast way for reviewers to suggest code changes that can be easily applied by change owner.
Reviewer workflow
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Select line or multiple lines of diff and start comment
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Click on suggest fix - that copies whole selected line/lines
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Modify lines in the suggestion block. Optionally add more details as normal comment text before or after the suggestion block.
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Optionally you can preview suggested edit by clicking on Preview fix when you stop editing comment
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Author workflow
You can apply one or more suggested fixes. When suggested fix is applied - it creates a change edit that you can modify. More about editing mode.
Part of Gerrit Code Review