Changes
Allow upright=yes to add "|upright" without a value (File:Name.png|frameless|upright). Tested with /sandbox and /testcases. Announced on talk page 7 days ago, no comments posted.
result = result .. "|border";
end
if upright == "yes" then result = result .. "|upright"; elseif upright ~= "" then
result = result .. "|upright=" .. upright;
end