1 tail (basename) of 'a/b/c' is 'c' 2 tail (basename) of 'def' is 'def' 3 tail (basename) of 'a.b.c' is 'a.b.c' 4 tail (basename) of 'a.b/c' is 'c' 5 tail (basename) of 'a' is 'a' 6 tail (basename) of 'a.a' is 'a.a' 7 tail (basename) of '.gitignore' is '.gitignore' 8 tail (basename) of 'a' is 'a' 9 tail (basename) of 'a.a' is 'a.a' 10 exit status 0 11