Add test cases from issue 226 thanks to @spookylukey
Add test cases from issue 226 thanks to @spookylukey

tomviner/isort,adamchainz/isort,jmullan/isort,graingert/isort,tomviner/isort,levic/isort,aequitas/isort,PyCQA/isort,aequitas/isort,pahko/isort,jamesbroadhead/isort,leepa/isort,AbsoluteMSTR/isort,pahko/isort,levic/isort,AbsoluteMSTR/isort,leepa/isort,gforcada/isort,jamesbroadhead/isort,PyCQA/isort,wimglenn/isort,wimglenn/isort,gforcada/isort,jmullan/isort,adamchainz/isort,graingert/isort