A 'None' license resulted in a 'Unicode' license in the spec file while
generating a new .spec with 'py2pack generate'. Fix that and leave the
License empty in the spec.
Also add a test case for the license transformation.
Coverage increased (+1.22%) to 42.03% when pulling cc900263d64f210a023ad7f3ceb0f6a6ee3a2b40 on toabctl:license-unicode into 367eda8c378035a5f99f7c221e26b174652e7152 on saschpe:master.
A 'None' license resulted in a 'Unicode' license in the spec file while generating a new .spec with 'py2pack generate'. Fix that and leave the License empty in the spec. Also add a test case for the license transformation.