Add test for top comments, thanks to @timgraham
Add test for top comments, thanks to @timgraham

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