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

Lars Schneider [off-list ref] writes:

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.

That makes more sense to me.