I have files that I want to compare, and I would need to have a way to force lines to match for the algorithm to pick the block to compare correctly.

For example:
FILE1

```
test1
    subline1
    subline2
    subline3
test2
    subline1
    subline2
    subline3
    subline4
test3
    subline1
    subline2
    subline3
test4
    subline1
test5
    subline2
    subline3
    subline4

```

FILE2

```
test1
    subline1
    subline2
    subline3
test3
    subline1
    subline2
    subline3
    subline4
test4
    subline1
    subline2
    subline3
    subline4

```

Any Tools I use out there, I cannot force a perfect match on the line with "test", and since the content of the blocks are similar, it's always matching incorrectly. 

See images below :
[Notepad++ Compare](https://i.stack.imgur.com/P7SHF.png)
[Winmerge](https://i.stack.imgur.com/CNeEZ.png)

Meld and diff didn't work either.

Thanks