import: strange error with path ending in /

[jorgeorpinel]

DVC version: 0.50.1
Python version: 3.7.3
Platform: Darwin-18.6.0-x86_64-i386-64bit

First dvc init an empty DVC repo and run the following inside. In my case the working dir is called emptydvcrepo.

$ dvc import https://github.com/iterative/example-get-started data/prepared/
...
ERROR: failed to import 'data/prepared/' from
'https://github.com/iterative/example-get-started'. - current working directory
'/path/to/emptydvcrepo' is specified as an output in 'emptydvcrepo.dvc'. Use another CWD
to prevent any data removal.

Notice the given path, data/prepared/ ending with / and the error mentioning an inexistent DVC-file called emptydvcrepo.dvc.

It works normally without the slash.

[pared]

The problem is that when generating default default_out name in imp_url we do not normalize path, so basename for anything ending with '/' will be ``, which will lead to some strange behaviour, like creating stage file with repo directory name.