Add comment explaining why we look for simple.el on startup.

1 files changed, 2 insertions, 0 deletions

diff --git a/lisp/startup.el b/lisp/startup.el
index 3e26aa17409..10fadfbfd77 100644
--- a/lisp/startup.el
+++ b/lisp/startup.el
@@ -647,6 +647,8 @@ or `CVS', and any subdirectory that contains a file named `.nosearch'."
 
   ;; Convert preloaded file names in load-history to absolute.
   (let ((simple-file-name
+         ;; Look for simple.el or simple.elc and use their directory
+         ;; as the place where all Lisp files live.
          (locate-file "simple" load-path (get-load-suffixes)))
         lisp-dir)
     ;; Don't abort if simple.el cannot be found, but print a warning.