_
Originally named /nul, /_ is a repository of nothing.
Well, this repository is made for testing many things. It's open, random, and unprofessional.
If the current license in LICENSE file is not a BSD 3-Clause License, then does not imply anything because license itself is also is one of the test subject - this repository is currently under a BSD 3-Clause License.
Q&A
Q: Can I clone this repository?
A: Feel free to do so! But I don't think you can clone it in Windows operating system or DOS.
Q: Why is there a striked-through QA pair?
A: The repository was originally named nul, thus it might not be possible to extract it in DOS-based system since it is a reserved device name