DOC: Distinct warnings for benchmark and treasury fetchers (#1971)
DOC: Distinct warnings for benchmark and treasury fetchers (#1971)

* DOC: Distinct warnings for benchmark and treasury fetchers

The core of data/loader.py is the function load_market_data which
in turns calls functions ensure_benchmark_data and
ensure_treasury_data. These two functions are similar. Their
logger.info and logger.exception messages are slightly different
but their logger.warn messages are the same.

Having two different functions outputing the same warning can
be needlessly confusing when debugging.

This commit makes these two warnings explicitely different.

* DOC: Made previous commit compliant with flake8

* DOC: Added dates to treasury data fetcher logger.info

humdings/zipline,quantopian/zipline,quantopian/zipline,alphaBenj/zipline,humdings/zipline,alphaBenj/zipline