CSV is a machine-readable format. I've never heard of a machine-readable format that treats combining characters as significant when parsing syntax. Certainly t

CSV is a machine-readable format. I've never heard of a machine-readable format that treats combining characters as significant when parsing syntax. Certainly the CSV format doesn't. Trivial proof: If it did, then it would be literally impossible to represent a field starting with a combining character. Also, the set of combining characters has changed over time. Machine-readable formats in general do not change as Unicode does. A CSV that parses today should not fail to parse next year because a field starts with a codepoint that today is unused and next year has been assigned to a combining character.