fix: add an API Blueprint parser bug workaround
fix: add an API Blueprint parser bug workaround

This was previously a core part of Dredd. It belongs to Dredd Transactions
though as it's a format-specific bug fix. Ideally, Dredd shouldn't need
to know anything about the specifics of formats, Dredd Transactions
should provide a uniform interface.

https://github.com/apiaryio/api-blueprint/issues/401

apiaryio/dredd-transactions,apiaryio/dredd,apiaryio/dredd,apiaryio/dredd-transactions,apiaryio/dredd