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