emacs: use closures instead of backquoted lambdas

emacs/notmuch-hello.el

@@ -869,15 +869,15 @@ Supports the following entries in OPTIONS as a plist:
 	(start (point)))
     (if is-hidden
 	(widget-create 'push-button
-		       :notify `(lambda (widget &rest _ignore)
+		       :notify (lambda (&rest _ignore)
 				 (setq notmuch-hello-hidden-sections
-					(delete ,title notmuch-hello-hidden-sections))
+				       (delete title notmuch-hello-hidden-sections))
 				 (notmuch-hello-update))
 		       "show")
       (widget-create 'push-button
-		     :notify `(lambda (widget &rest _ignore)
+		     :notify (lambda (&rest _ignore)
 			       (add-to-list 'notmuch-hello-hidden-sections
-					     ,title)
+					    title)
 			       (notmuch-hello-update))
 		     "hide"))
     (widget-insert "\n")

emacs/notmuch-jump.el

@@ -50,11 +50,11 @@ fast way to jump to a saved search from anywhere in Notmuch."
 	    (push (list key name
 			(cond
 			 ((eq (plist-get saved-search :search-type) 'tree)
-			  `(lambda () (notmuch-tree ',query)))
+			  (lambda () (notmuch-tree query)))
 			 ((eq (plist-get saved-search :search-type) 'unthreaded)
-			  `(lambda () (notmuch-unthreaded ',query)))
+			  (lambda () (notmuch-unthreaded query)))
 			 (t
-			  `(lambda () (notmuch-search ',query ',oldest-first)))))
+			  (lambda () (notmuch-search query oldest-first)))))
 		  action-map)))))
     (setq action-map (nreverse action-map))
     (if action-map
@@ -168,8 +168,9 @@ buffer."
     (pcase-dolist (`(,key ,_name ,fn) action-map)
       (when (= (length key) 1)
 	(define-key map key
-	  `(lambda () (interactive)
-	     (setq notmuch-jump--action ',fn)
+	  (lambda ()
+	    (interactive)
+	    (setq notmuch-jump--action fn)
 	    (exit-minibuffer)))))
     ;; By doing this in two passes (and checking if we already have a
     ;; binding) we avoid problems if the user specifies a binding which
@@ -191,9 +192,10 @@ buffer."
 		  action-submap)
 	    (setq action-submap (nreverse action-submap))
 	    (define-key map keystr
-	      `(lambda () (interactive)
+	      (lambda ()
+		(interactive)
 		(setq notmuch-jump--action
-		       ',(apply-partially #'notmuch-jump
+		      (apply-partially #'notmuch-jump
 				       action-submap
 				       new-prompt))
 		(exit-minibuffer)))))))

emacs/notmuch-tag.el

@@ -553,7 +553,7 @@ and vice versa."
 				name)
 			    (mapconcat #'identity tag-change " "))))
 	(push (list key name-string
-		    `(lambda () (,tag-function ',tag-change)))
+		    (lambda () (funcall tag-function tag-change)))
 	      action-map)))
     (push (list notmuch-tag-jump-reverse-key
 		(if reverse