How to use Text Diff
Paste the old version in Before and the new version in After. A minus marks a removed line and a plus marks an added line. An initial space marks an unchanged line.
Example
Before / Antes: alpha beta gamma After / Depois: alpha gamma delta
alpha -beta gamma +delta
Read the result
The side-by-side TSV has status, before and after columns. Moving a line can appear as a removal and an addition. For large edits, compare smaller sections.