(tag-exact-match-p): Test for point sitting after the explicit tag name

itself.

lisp/progmodes/etags.el

@@ -1149,7 +1149,10 @@ See documentation of variable `tags-file-name'."
 ;; point should be just after a string that matches TAG.
 (defun tag-exact-match-p (tag)
   ;; The match is really exact if there is an explicit tag name.
-  (or (looking-at (concat "[^\177\n]*\177" (regexp-quote tag) "\001"))
+  (or (and (eq (char-after (point)) ?\001)
+	   (eq (char-after (- (point) (length tag)) ?\177)))
+      ;; We are not on the explicit tag name, but perhaps it follows.
+      (looking-at (concat "[^\177\n]*\177" (regexp-quote tag) "\001"))
       ;; We also call it "exact" if it is surrounded by symbol boundaries.
       ;; This is needed because etags does not always generate explicit names.
       (and (looking-at "\\Sw.*\177") (looking-at "\\S_.*\177")