Use diff when you need to verify what changed
Common high-intent jobs
- Review before/after SQL query changes
- Check whether cleaned HTML changed structure
- Compare config revisions before deployment
What the diff output means
| Marker | Meaning |
|---|---|
- | The line appears only in the original text. |
+ | The line appears only in the updated text. |
unchanged | The line is identical in both blocks. |
| Summary | The result panel counts changed, added, removed, and unchanged lines so you can scan the size of the edit before copying it. |