[rubygems/rubygems] util/rubocop -A --only Style/Semicolon

https://github.com/rubygems/rubygems/commit/97f062be05

test/rubygems/test_gem_specification.rb

@@ -804,7 +804,10 @@ dependencies: []
       end
 
       full_path.taint
-      loader = Thread.new { $SAFE = 1; Gem::Specification.load full_path }
+      loader = Thread.new do
+        $SAFE = 1
+        Gem::Specification.load full_path
+      end
       spec = loader.value
 
       @a2.files.clear