[Open Babel] Unspecified chirality [C@?]

[Craig A. J. <cj...@em...>]

When did this happen?

    echo "CC(Br)Cl"| babel -i smi -o can
    C[C@?H](Cl)Br

I've never seen @? before, and it seems unnecessary.  The definition of SMILES is that if chirality isn't explicitely specified as '@' or '@@', then it's by definition unspecified, so @? has no purpose.  I've commented it out in my version, since it's impossible to get decent canonical SMILES.

Thanks,
Craig