When allow interpolation multiline first line of values are cutted

[nfalco79]

I have a PyPI config file like this:

[distutils]
index-servers =
    pypi
    pypitest

[pypi]
repository: https://pypi.python.org/pypi
username: your_username
password: your_password

[pypitest]
repository: https://testpypi.python.org/pypi
username: your_username
password: your_password

Now I would add a new server to the index:

Ini ini = new Ini();
ini.read(file);
ini.sections().get("distutils").put("index-servers", "test\npypi\npypitest")
ini.getSections().put("test", new HashMap<String, String>());
ini.write(file2);

the files will contains:

[distutils]
index-servers =
    pypi
    pypitest

[pypi]
repository: https://pypi.python.org/pypi
username: your_username
password: your_password

[pypitest]
repository: https://testpypi.python.org/pypi
username: your_username
password: your_password

[test]

the new value of index-servers "test\npypi\npypitest" is replaced by interpolation with "\npypi\npypitest". The first row is removed.