Just trying to add tests for this... It seems like Copyright (c) 2018, 2019 Developers is actually accepted on main? See: https://play.ruff.rs/5c5932af-5fef-4990-bcc5-c854c0b46255

It seems like the current regex could be described as "Must contain Copyright\s+(\(C\)\s+)?\d{4}, followed by anything". So Copyright (c) 2018, 2019 Developers would match as "Copyright (c) 2018, followed by anything".

It seems like the current regex could be described as "Must contain Copyright\s+(\(C\)\s+)?\d{4}, followed by anything". So Copyright (c) 2018, 2019 Developers would match as "Copyright (c) 2018, followed by anything".

Nit: you probably want [0-9] instead of \d. Or, equivalently, (?-u:\d). See: https://docs.rs/regex/latest/regex/#example-validating-a-particular-date-format

Closing for now, but happy to revisit if we get more info.

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