[ruby/win32-registry] Exclude rake files from packages [ci skip]

https://github.com/ruby/win32-registry/commit/e7b2eeb885

ext/win32/win32-registry.gemspec

@@ -15,10 +15,13 @@ Gem::Specification.new do |spec|
 
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
+  excludes = %w[
+    bin/ test/ spec/ features/ rakelib/
+    .git .github .mailmap appveyor Rakefile Gemfile
+  ]
   spec.files = Dir.chdir(__dir__) do
     `git ls-files -z`.split("\x0").reject do |f|
-      (File.expand_path(f) == __FILE__) ||
-        f.start_with?(*%w[bin/ test/ spec/ features/ .git .github .mailmap appveyor Gemfile])
+      File.identical?(f, __FILE__) || f.start_with?(*excludes)
     end
   end
   spec.bindir = "exe"