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880c0fdd - [advanced dreambooth lora training script][bug_fix] change token_abstraction type to str (#6040)

[advanced dreambooth lora training script][bug_fix] change token_abstraction type to str (#6040) * improve help tags * style fix * changes token_abstraction type to string. support multiple concepts for pivotal using a comma separated string. * style fixup * changed logger to warning (not yet available) * moved the token_abstraction parsing to be in the same block as where we create the mapping of identifier to token --------- Co-authored-by: Linoy <linoy@huggingface.co>