Github user dkuppitz commented on the issue:
https://github.com/apache/tinkerpop/pull/950
Reminder: Merge #949 first, then rebase this PRs branch and fix `PTest`
(include differing number tests for `Contains` predicates).
https://github.com/apache/tinkerpop/pull/949/files#diff-dc8c8777ab12a44729fc5f2c9c255c66R115---
