Clarify use of CSV for Keywords field (in current peps/specs)

[qwcode]

From http://bugs.python.org/issue1294032 :

The distutils package writes out the Keywords metadata field in PKG-INFO comma-separated, while the Cheeseshop/PyPI follows the PEP 341 example and seems to expect space separated keywords.
Either this needs clarifying in the PEP or [distutils] or PyPI should be altered to better integrate.
I’ve always thought that distutils using CSV was a Good Thing™, as a keyword is not necessarily one word (e.g. “text processing” or “package management”).

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migrated from https://bitbucket.org/pypa/pypi-metadata-formats/issues/30/clarify-use-of-csv-for-keywords-field