Don't package test files with gem [ci skip]

Author: sferik

thor.gemspec

@@ -9,16 +9,12 @@ Gem::Specification.new do |spec|
   spec.description = %q(Thor is a toolkit for building powerful command-line interfaces.)
   spec.email = "[email protected]"
   spec.executables = %w[thor]
-  spec.files = %w[.document CHANGELOG.md LICENSE.md README.md Thorfile thor.gemspec]
-  spec.files += Dir.glob("bin/**/*")
-  spec.files += Dir.glob("lib/**/*.rb")
-  spec.files += Dir.glob("spec/**/*")
+  spec.files = %w[.document CHANGELOG.md LICENSE.md README.md thor.gemspec] + Dir['bin/*'] + Dir['lib/**/*.rb']
   spec.homepage = "http://whatisthor.com/"
   spec.licenses = %w[MIT]
   spec.name = "thor"
   spec.require_paths = %w[lib]
   spec.required_rubygems_version = ">= 1.3.5"
   spec.summary = spec.description
-  spec.test_files = Dir.glob("spec/**/*")
   spec.version = Thor::VERSION
 end