Return the canonicalized absolute pathname (see POSIX function realpath)

Require: file_exists

Property definitions

core :: file $ Text :: realpath
	# Return the canonicalized absolute pathname (see POSIX function `realpath`)
	#
	# Require: `file_exists`
	fun realpath: String do
		var cs = to_cstring.file_realpath
		assert file_exists
		var res = cs.to_s
		cs.free
		return res
	end
lib/core/file.nit:1029,2--1038,4