Fix a corner case when depicting cc(C)c

[johnmay]

Fixes #1057

Note @JonasSchaub this is bending the rules of what the depictor is meant to do. It's an invalid SMILES string and so it can't really many anything.

Example of what it now does below:

[johnmay]

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
61.1% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[JonasSchaub]

Note @JonasSchaub this is bending the rules of what the depictor is meant to do. It's an invalid SMILES string and so it can't really many anything.

Thanks a lot @johnmay for "bending the rules" this way for my use case. I've also checked the fix for bigger cases I encountered, like "cc(-c1ccccc1)c(c2ccccc2)C", and it works fine there as well. Thank you!