Fix extra `}` generated when `ret ++ fargs` is empty and remove extra `}`s from generated files#4

Coda-Coda wants to merge 3 commits intoNethermindEth:erc20NethermindEth/Clear:erc20from

Coda-Coda:erc20-fix-extra-bracesCoda-Coda/Nethermind-Clear:erc20-fix-extra-bracesCopy head branch name to clipboard