Re: [PATCH] convert: legitimately disable clean/smudge filter with an empty override

> If the clean/smudge command of a Git filter driver (filter.<driver>.smudge and
> filter.<driver>.clean) is set to an empty string ("") and the filter driver is
> not required (filter.<driver>.required=false) then Git will run successfully.
> However, Git will print an error for every file that is affected by the filter.
>
> Teach Git to consider an empty clean/smudge filter as legitimately disabled
> and do not print an error message if the filter is not required.