* ok 1: git-update-cache --add to add various paths.
* ok 2: git-ls-files -k to show killed files.
* ok 3: validate git-ls-files -k output.
* ok 1: git-update-cache --add to add various paths.
* ok 2: git-ls-files -k to show killed files.
* ok 3: validate git-ls-files -k output.