bug#21704: 25.0.50; Package (package.el) doc should mention effects on `load-path'

[Eli Zaretskii]

> From: Noam Postavsky <npostavs@users.sourceforge.net>
> Date: Mon, 27 Jun 2016 00:45:07 -0400
> Cc: Lars Ingebrigtsen <larsi@gnus.org>
> 
> > Do you have a suggestion as to where in the manual we should mention the
> > load-path impact?
> 
> How about in Package Installation? (see attached patch)

Thanks.  One comment:

> +loading a Lisp library (@pxref{Lisp Libraries}); loading a package
> +adds its directory to @var{load-path} and loads its autoloads.  The

Please use @code{load-path}, not @var.  The latter is for things like
function arguments, which stand for some particular value, whereas
load-path is a literal symbol.