Fix a few more minor quoting problems.

Author: eggert

lisp/erc/erc-stamp.el

@@ -357,7 +357,7 @@ Return the empty string if FORMAT is nil."
 	ts)
     ""))
 
-;; This function is used to munge `buffer-invisibility-spec to an
+;; This function is used to munge `buffer-invisibility-spec' to an
 ;; appropriate value. Currently, it only handles timestamps, thus its
 ;; location.  If you add other features which affect invisibility,
 ;; please modify this function and move it to a more appropriate

lisp/gnus/nnmairix.el

@@ -1459,7 +1459,7 @@ group."
 	  (while (and allservers (not found))
 	    (setq mairixserver (gnus-server-to-method (car (pop allservers))))
 	    ;; First we look if SERVER is the backend of current nnmairix server
-	    (setq found (and (eq (cadr (assoc `nnmairix-backend mairixserver))
+	    (setq found (and (eq (cadr (assoc 'nnmairix-backend mairixserver))
 				 (car server))
 			     (string= (cadr (assoc 'nnmairix-backend-server mairixserver))
 				      (nth 1 server))))

lisp/obsolete/vip.el

@@ -2250,7 +2250,7 @@ a token has type \(command, address, end-mark\) and value."
 	   (forward-char 1)
 	   (cond ((looking-at "'") (setq ex-token nil))
 		 ((looking-at "[a-z]") (setq ex-token (following-char)))
-		 (t (error "%s" "Marks are ' and a-z" ?')))
+		 (t (error "%s" "Marks are ' and a-z")))
 	   (forward-char 1))
 	  ((looking-at "\n")
 	   (setq ex-token-type "end-mark")

lisp/progmodes/compile.el

@@ -1252,7 +1252,7 @@ FMTS is a list of format specs for transforming the file name.
   (unless file (setq file '("*unknown*")))
   (let* ((file-struct (compilation-get-file-structure file fmts))
 	 ;; Get first already existing marker (if any has one, all have one).
-	 ;; Do this first, as the compilation-assq`s may create new nodes.
+	 ;; Do this first, as the compilation-assq's may create new nodes.
 	 (marker-line	; a line structure
           (cadr (compilation--file-struct->loc-tree file-struct)))
 	 (marker

lisp/simple.el

@@ -9065,7 +9065,7 @@ contains the list of implementations currently supported for this command."
              (unless (string-equal val "")
 	       (when (null ,varimp-sym)
 		 (message
-		  "Use C-u M-x %s RET`to select another implementation"
+		  "Use `C-u M-x %s RET' to select another implementation"
 		  ,command-name)
 		 (sit-for 3))
 	       (customize-save-variable ',varimp-sym

lisp/textmodes/remember.el

@@ -148,7 +148,7 @@
 ;; out, in the long run?  Perhaps its because the time we save
 ;; electronically in one way, we're losing electronically in another;
 ;; the tool should never dominate one's focus.  As the mystic
-;; Faridu'd-Din `Attar wrote: "Be occupied as little as possible with
+;; Farīd ud-Dīn ʿAṭṭār wrote: "Be occupied as little as possible with
 ;; things of the outer world but much with things of the inner world;
 ;; then right action will overcome inaction."
 ;;