specification: files, many gems use `git ls-files -z`

[sanemat]

E.g.

  spec.files         = `git ls-files -z`
    .split("\x0")
    .reject { |f| f.match(%r{^(test|spec|features)/}) }

[sanemat]

My expectation:

fixtures
https://github.com/packsaddle/ruby-parse_gemspec/tree/54b1bb7366e38d1f8bb99406dae8e30ee5078a86/test/fixtures

1. array
   • gemspec has array, then show them.
2. git repository
   • run git ls-files in this git repository.
3. gem unpacked
   • run git ls-files, and show files = []. without stdout, stderr