if there is no INFOPATH variable in the environment.
The last element of `Info-default-directory-list' is the directory
where Emacs installs the Info files that come with it.
-If Emacs finds it has been installed elsewhere, or not yet installed,
-it replaces that element with the directory that its Info files are in.")
+
+If you run the Emacs executable from the `src' directory in the Emacs
+source tree, the `info' directory in the source tree is used as the last
+element, in place of the installation Info directory. This is useful
+when you run a version of Emacs without installing it.")
(defvar Info-current-file nil
"Info file that Info is now looking at, or nil.")