Fix misuses of `make-local-variable` on hooks

* lisp/vc/smerge-mode.el (smerge-ediff):
* lisp/progmodes/python.el (python-pdbtrack-setup-tracking):
* lisp/net/tramp-smb.el (tramp-smb-call-winexe):
* lisp/net/secrets.el (secrets-mode):
* lisp/mail/rmail.el (rmail-variables):
* lisp/ielm.el (inferior-emacs-lisp-mode):
* lisp/erc/erc-log.el (erc-log-setup-logging): Use `add-hook`.

* lisp/eshell/em-unix.el (eshell/diff):
* lisp/eshell/em-hist.el (eshell-hist-initialize): Don't
`make-local-variable` on hooks.

1 files changed, 2 insertions, 2 deletions

diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index 53b654001e3..d6feba254b4 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -4011,8 +4011,8 @@ Argument OUTPUT is a string with the output from the comint process."
   "Setup pdb tracking in current buffer."
   (make-local-variable 'python-pdbtrack-buffers-to-kill)
   (make-local-variable 'python-pdbtrack-tracked-buffer)
-  (add-to-list (make-local-variable 'comint-input-filter-functions)
-               #'python-pdbtrack-comint-input-filter-function)
+  (add-hook 'comint-input-filter-functions
+            #'python-pdbtrack-comint-input-filter-function nil t)
   (add-to-list (make-local-variable 'comint-output-filter-functions)
                #'python-pdbtrack-comint-output-filter-function)
   (add-function :before (process-sentinel (get-buffer-process (current-buffer)))