Fixes #3359

[siddhant2002]

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.

[siriak]

Which algorithm is that?

[siriak]

File names are not in PascalCase

[siddhant2002]

Which algorithm is that?

It displays all the paths from source to target

[siddhant2002]

File names are not in PascalCase

I've modified the file names

[siddhant2002]

@siriak please check the updated pr

[siddhant2002]

@siriak I've done the necessary changes. Please check the pr. The return type cannot be changed to int [ ][ ] as the junit are being used.

[siriak]

The code looks good, please fix failing tests
Error: AllPathsFromSourceToTargetTest.testForFirstCase:18 iterable contents differ at index [0][0], expected: <0> but was: <2>
Error: AllPathsFromSourceToTargetTest.testForFourthcase:51 iterable contents differ at index [0][2], expected: <3> but was: <2>
Error: AllPathsFromSourceToTargetTest.testForThirdCase:40 iterable contents differ at index [0][0], expected: <0> but was: <1>

[siriak]

Looks good, thanks!