Remove test files from final gem (take 2)

[JuanitoFatas]

Hi!

Take 2 of #179. Sorry, I wasn't aware this was generated by Hoe.

After this Pull Request if you run rake gemspec:

-  s.extra_rdoc_files = ["CHANGELOG.md".freeze, "MIT-LICENSE.txt".freeze, "Manifest.txt".freeze, "README.md".freeze, "SECURITY.md".freeze, "CHANGELOG.md".freeze, "README.md".freeze, "SECURITY.md".freeze]
-  s.files = [".gemtest".freeze, "CHANGELOG.md".freeze, "Gemfile".freeze, "MIT-LICENSE.txt".freeze, "Manifest.txt".freeze, "README.md".freeze, "Rakefile".freeze, "SECURITY.md".freeze, "benchmark/benchmark.rb".freeze, "benchmark/fragment.html".freeze, "benchmark/helper.rb".freeze, "benchmark/www.slashdot.com.html".freeze, "lib/loofah.rb".freeze, "lib/loofah/elements.rb".freeze, "lib/loofah/helpers.rb".freeze, "lib/loofah/html/document.rb".freeze, "lib/loofah/html/document_fragment.rb".freeze, "lib/loofah/html5/libxml2_workarounds.rb".freeze, "lib/loofah/html5/safelist.rb".freeze, "lib/loofah/html5/scrub.rb".freeze, "lib/loofah/instance_methods.rb".freeze, "lib/loofah/metahelpers.rb".freeze, "lib/loofah/scrubber.rb".freeze, "lib/loofah/scrubbers.rb".freeze, "lib/loofah/xml/document.rb".freeze, "lib/loofah/xml/document_fragment.rb".freeze, "test/assets/msword.html".freeze, "test/assets/testdata_sanitizer_tests1.dat".freeze, "test/helper.rb".freeze, "test/html5/test_sanitizer.rb".freeze, "test/html5/test_scrub.rb".freeze, "test/integration/test_ad_hoc.rb".freeze, "test/integration/test_helpers.rb".freeze, "test/integration/test_html.rb".freeze, "test/integration/test_scrubbers.rb".freeze, "test/integration/test_xml.rb".freeze, "test/unit/test_api.rb".freeze, "test/unit/test_encoding.rb".freeze, "test/unit/test_helpers.rb".freeze, "test/unit/test_scrubber.rb".freeze, "test/unit/test_scrubbers.rb".freeze]
+  s.extra_rdoc_files = ["CHANGELOG.md".freeze, "MIT-LICENSE.txt".freeze, "Manifest.txt".freeze, "README.md".freeze, "SECURITY.md".freeze]
+  s.files = ["CHANGELOG.md".freeze, "Gemfile".freeze, "MIT-LICENSE.txt".freeze, "Manifest.txt".freeze, "README.md".freeze, "Rakefile".freeze, "SECURITY.md".freeze, "benchmark/benchmark.rb".freeze, "benchmark/fragment.html".freeze, "benchmark/helper.rb".freeze, "benchmark/www.slashdot.com.html".freeze, "lib/loofah.rb".freeze, "lib/loofah/elements.rb".freeze, "lib/loofah/helpers.rb".freeze, "lib/loofah/html/document.rb".freeze, "lib/loofah/html/document_fragment.rb".freeze, "lib/loofah/html5/libxml2_workarounds.rb".freeze, "lib/loofah/html5/safelist.rb".freeze, "lib/loofah/html5/scrub.rb".freeze, "lib/loofah/instance_methods.rb".freeze, "lib/loofah/metahelpers.rb".freeze, "lib/loofah/scrubber.rb".freeze, "lib/loofah/scrubbers.rb".freeze, "lib/loofah/xml/document.rb".freeze, "lib/loofah/xml/document_fragment.rb".freeze]

Best,
Juanito

[flavorjones]

See related #166 and #159