The Diff tool feature which aligns similar lines can be difficult to describe and easily overlooked but without it as one user put it “I can’t see what has actually changed”. Based on my recent survey of 5 other diff tools I’d estimate about half of all diff tools (at the most) have this ability. The best way to describe this feature is with a test case and screen shot.
These screen shots are taken from running the “similar” test case (similar.zip). Here is the Guiffy diff tool view without the align similar lines option enabled:
Here is the Guiffy diff tool view with the align similar lines option enabled:
Other diff tools may not have such an option or it may be called something else. Check the diff tool’s options/settings and help for such a feature. The “similar” test case helps to determine if the feature is available.
If you have a diff tool feature you’d like to discuss or a test case to share, just let me know.