I made changes in manifest.py which can be viewed here: https://bitbucket.org/pkumar/distutils2_bugs/changeset/111c1253ea7a

I'm not sure if I should modify test_command_sdist.py for the failing tests of manifest contents(since it is mentioned not to edit). 

msg133834:
>> I don’t understand this comment: “Though, inside zip-file we get files without its parent dir, nothing changes in manifest file(should it change?)

code from test_command_sdist.py:

        zip_file = zipfile.ZipFile(join(dist_folder, 'fake-1.0.zip'))
        try:
            content = zip_file.namelist()
        finally:
            zip_file.close()
after the change as mentioned in msg127191, the value of content changed, i.e. 'fake-1.0/some/other_file.txt' was changed to 'fake-1.0/other_file.txt'.But modifications were still required for the manifest. Above change should serve the purpose, I guess.