They could do something like a BOM. Any comment without the wchar in position [0] is rendered historically. Anything with it is rendered using markdown (or another renderer).
It adds no new columns, and better still if you pick a symbol which is nuked by TRIM() e.g. \x0B [U+000B] (vertical tab) then it might be ignored by existing infrastructure/trimmed.
It adds no new columns, and better still if you pick a symbol which is nuked by TRIM() e.g. \x0B [U+000B] (vertical tab) then it might be ignored by existing infrastructure/trimmed.