Provides a default end of line style for a file.
Pathname identifying location of
An external format spec.
A buffer whose contents are examined.
Length (an integer) up to which
should be examined.
A new external format spec created by merging
with the encoding that was found.
(:default :eol-style :crlf)
on Microsoft Windows,
(:default :eol-style :lf)
on UNIX/Linux/Mac OS X. This is usually used as the last function on its list.
LispWorks User Guide and Reference Manual - 21 Dec 2011