Can [sic] be used to show an omission or error in punctuation?
Eg:
Original:
He was, happy to get a raise.
Revised:
He was [sic] happy to get a raise.
There shouldn't be a comma after 'was'.
Original:
Mike liked lasagna, Diane preferred ziti.
Revised:
Mike liked lasagna [sic] Diane preferred ziti.
There should be a semicolon - not a comma - between the sentences.