git help attributes sayeth:

	eol
		This attribute sets a specific line-ending style to be
		used in the working directory. It enables end-of-line
		normalization without any content checks, effectively
		setting the text attribute.

But does text=auto override that?

While we're here, it would also be nice to clarify platform-specific
eol defaults, etc.

Context:
http://colabti.org/irclogger/irclogger_log/git?date=2014-07-18#l4289
and surrounding conversation