why.empty
You passed the reason as a shell variable that did not expand, or piped in an empty file, so the line names a problem and gives nothing to weigh it against.
What it means
Section titled “What it means”The field is blank; a line with no why states a problem and no reason for it.
You write the shorter or corrected text. Nothing can derive it for you.
What closes it
Section titled “What closes it”roadkeep amend … --why …— the field is blank; a line with no why states a problem and no reason for it