langchain

f257b084 - Removed duplicate "revision_request" in constitutional_ai/prompts.py (#2046)

Removed duplicate "revision_request" in constitutional_ai/prompts.py (#2046) Removed a duplicate "revision_request" in the second example within [this file](https://github.com/hwchase17/langchain/blob/master/langchain/chains/constitutional_ai/prompts.py).