Move shell-dir-cookie-re feature into Dirtrack mode.

* lisp/dirtrack.el (dirtrack-list): Eliminate unused third element.
(dirtrack): Merge code for handling relative filenames in prompt
from shell-dir-cookie-watcher.
(dirtrack-debug-message): New arg to avoid excess format calls.

* lisp/shell.el (shell-dir-cookie-re): Variable deleted.
(shell-dir-cookie-watcher): Function deleted.
(shell-mode): Don't use shell-dir-cookie-re, since it is redundant
with dirtrack-mode.

1 files changed, 0 insertions, 4 deletions

diff --git a/etc/NEWS b/etc/NEWS
index c0058800919..fc390df7743 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -749,10 +749,6 @@ Try using `rmail-show-message-hook' instead.
 directory is a remote file name and neither the environment variable
 $ESHELL nor the variable `explicit-shell-file-name' is set.
 
-*** New variable `shell-dir-cookie-re'.
-If set to an appropriate regexp, Shell mode can track your cwd by
-reading it from your prompt.
-
 ---
 ** SQL Mode enhancements.