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Since coverage is a test related notion, this seems a better place. The final goal is to include it with the secp256k1 library, and the `contrib` directory is conflicting.

This seems a better place. The final goal is to include it with the secp256k1 library, and the `contrib` directory is conflicting.

Since coverage is a test related notion, thisThis seems a better place. The final goal is to include it with the secp256k1 library, and the `contrib` directory is conflicting.