Use capture_output instead of capture_io

hsbt · hsbt · commit c46185abe3cb · 2021-05-11T19:01:23.000+09:00
diff --git a/test/rubygems/test_gem_package.rb b/test/rubygems/test_gem_package.rb
@@ -1068,7 +1068,7 @@ def entry.full_name() raise ArgumentError, 'whatever' end
     _, err = use_ui @ui do
       e = nil
 
-      out_err = capture_io do
+      out_err = capture_output do
         e = assert_raise ArgumentError do
           package.verify_entry entry
         end
