Clarify that load-path contents should be directory file names

* doc/lispref/files.texi (Directory Names): Define and use "directory
file name". Recommend `expand-file-name'.

* src/lread.c (load-path): Fix doc string; elements are directory file
names.

1 files changed, 4 insertions, 2 deletions

diff --git a/src/lread.c b/src/lread.c
index a98fa6199f1..1119f3fdfd4 100644
--- a/src/lread.c
+++ b/src/lread.c
@@ -4479,8 +4479,10 @@ were read in.  */);
 
   DEFVAR_LISP ("load-path", Vload_path,
                doc: /* List of directories to search for files to load.
-Each element is a string (directory name) or nil (meaning `default-directory').
-Initialized during startup as described in Info node `(elisp)Library Search'.  */);
+Each element is a string (directory file name) or nil (meaning
+`default-directory').  Initialized during startup as described in Info
+node `(elisp)Library Search'.  Use `directory-file-name' when adding items
+to this path.  */);
 
   DEFVAR_LISP ("load-suffixes", Vload_suffixes,
                doc: /* List of suffixes for (compiled or source) Emacs Lisp files.