jekyll/test/fixtures/test-theme/test-theme.gemspec

Gem::Specification.new do |s|
  s.name        = "test-theme"
  s.version     = "0.1.0"
  s.licenses    = ["MIT"]
  s.summary     = "This is a theme used to test Jekyll"
  s.authors     = ["Jekyll"]
  s.files       = ["lib/example.rb"]
  s.homepage    = "https://github.com/jekyll/jekyll"
end