* lisp/mail/: Use lexical-binding

Remove some redundant `:group` args as well.

* lisp/mail/supercite.el: Use lexical-binding.
(completer-disable): Declare var.
(sc-set-variable): Don't rely on dynbind to access `help` variable.

* lisp/mail/mail-extr.el: Use lexical-binding.
(mail-extract-address-components): Avoid use of dynamic scoping to
refer to local vars.

* lisp/mail/mailabbrev.el: Use lexical-binding.
(mail-abbrev-make-syntax-table): Rename `_` variable to `syntax-_`.

* lisp/mail/mailheader.el: Use lexical-binding.
(headers): Don't declare as dynbound globally.
(mail-header-set, mail-header-merge): Declare `headers` as dynbound
locally, instead.  Mark those functions as obsolete.
(mail-header-format): Use `alist-get` instead of `mail-header`.

* lisp/mail/binhex.el (binhex-decode-region-external): Remove always-nil
var `firstline`.

* lisp/mail/emacsbug.el: Use lexical-binding.
(report-emacs-bug): Remove always-nil var `message-end-point`.

* lisp/mail/rmail-spam-filter.el: Use lexical-binding.
(bbdb/mail_auto_create_p): Declare variable.

* lisp/mail/rmail.el (rmail-get-new-mail): Remove always-nil var
`delete-files`.

* lisp/mail/rmailout.el: Use lexical-binding.
(rmail-output-read-file-name): Remove unused var `err`.
(rmail-convert-to-babyl-format): Remove unused var `count`.
(rmail-output-as-mbox): Remove unused vars `from` and `date`.

* lisp/mail/rmailsort.el: Use lexical-binding.
(rmail-sort-messages): Remove unused var `msginfo`.

* lisp/mail/rfc822.el: Use lexical-binding.
* lisp/mail/rmailedit.el: Use lexical-binding.
* lisp/mail/mailclient.el: Use lexical-binding.
* lisp/mail/blessmail.el: Use lexical-binding.
* lisp/mail/mail-hist.el: Use lexical-binding.
* lisp/mail/rmailkwd.el: Use lexical-binding.
* lisp/mail/rmailmsc.el: Use lexical-binding.
* lisp/mail/uce.el: Use lexical-binding.
* lisp/mail/unrmail.el: Use lexical-binding.

1 files changed, 3 insertions, 3 deletions

diff --git a/lisp/mail/smtpmail.el b/lisp/mail/smtpmail.el
index 5526f2fbe64..5c7ffd99897 100644
--- a/lisp/mail/smtpmail.el
+++ b/lisp/mail/smtpmail.el
@@ -326,7 +326,7 @@ for `smtpmail-try-auth-method'.")
 	    ;; Insert an extra newline if we need it to work around
 	    ;; Sun's bug that swallows newlines.
 	    (goto-char (1+ delimline))
-	    (if (eval mail-mailer-swallows-blank-line)
+	    (if (eval mail-mailer-swallows-blank-line t)
 		(newline))
 	    ;; Find and handle any Fcc fields.
 	    (goto-char (point-min))
@@ -627,7 +627,7 @@ USER and PASSWORD should be non-nil."
 	   (= code (car response)))))
 
 (defun smtpmail-response-text (response)
-  (mapconcat 'identity (cdr response) "\n"))
+  (mapconcat #'identity (cdr response) "\n"))
 
 (defun smtpmail-query-smtp-server ()
   "Query for an SMTP server and try to contact it.
@@ -741,7 +741,7 @@ Returns an error if the server cannot be contacted."
 			   "Unable to contact server")))
 
 	  ;; set the send-filter
-	  (set-process-filter process 'smtpmail-process-filter)
+	  (set-process-filter process #'smtpmail-process-filter)
 
 	  (let* ((greeting (plist-get (cdr result) :greeting))
 		 (code (smtpmail-response-code greeting)))