RuboCop fixes

Author: jgarber623

webmention.gemspec

@@ -14,16 +14,16 @@ Gem::Specification.new do |spec|
   spec.license = "Apache-2.0"
 
   spec.files = Dir["lib/**/*"].reject { |f| File.directory?(f) }
-  spec.files += %w[LICENSE CHANGELOG.md CONTRIBUTING.md README.md USAGE.md]
-  spec.files += %w[webmention.gemspec]
+  spec.files += ["LICENSE", "CHANGELOG.md", "CONTRIBUTING.md", "README.md", "USAGE.md"]
+  spec.files += ["webmention.gemspec"]
 
   spec.require_paths = ["lib"]
 
   spec.metadata = {
     "bug_tracker_uri" => "#{spec.homepage}/issues",
     "changelog_uri" => "#{spec.homepage}/releases/tag/v#{spec.version}",
     "rubygems_mfa_required" => "true",
-    "source_code_uri" => "#{spec.homepage}/tree/v#{spec.version}"
+    "source_code_uri" => "#{spec.homepage}/tree/v#{spec.version}",
   }
 
   spec.add_runtime_dependency "http", "~> 5.2"