* lisp/info.el (Info-fontify-node): Don't stop at the non-title underline.

(Bug#21433)

lisp/info.el

@@ -4720,28 +4720,28 @@ first line or header line, and for breadcrumb links.")
       ;; Fontify titles
       (goto-char (point-min))
       (when (and font-lock-mode not-fontified-p)
-        (while (and (re-search-forward "\n\\([^ \t\n].+\\)\n\\(\\*\\*+\\|==+\\|--+\\|\\.\\.+\\)$"
-                                       nil t)
-                    ;; Only consider it as an underlined title if the ASCII
-                    ;; underline has the same size as the text.  A typical
-                    ;; counter example is when a continuation "..." is alone
-                    ;; on a line.
-                    (= (string-width (match-string 1))
-                       (string-width (match-string 2))))
-          (let* ((c (preceding-char))
-                 (face
-                  (cond ((= c ?*) 'info-title-1)
-                        ((= c ?=) 'info-title-2)
-                        ((= c ?-) 'info-title-3)
-                        (t        'info-title-4))))
-            (put-text-property (match-beginning 1) (match-end 1)
-                               'font-lock-face face))
-          ;; This is a serious problem for trying to handle multiple
-          ;; frame types at once.  We want this text to be invisible
-          ;; on frames that can display the font above.
-          (when (memq (framep (selected-frame)) '(x pc w32 ns))
-            (add-text-properties (1- (match-beginning 2)) (match-end 2)
-                                 '(invisible t front-sticky nil rear-nonsticky t)))))
+        (while (re-search-forward "\n\\([^ \t\n].+\\)\n\\(\\*\\*+\\|==+\\|--+\\|\\.\\.+\\)$"
+                                  nil t)
+          ;; Only consider it as an underlined title if the ASCII
+          ;; underline has the same size as the text.  A typical
+          ;; counter example is when a continuation "..." is alone
+          ;; on a line.
+          (when (= (string-width (match-string 1))
+                   (string-width (match-string 2)))
+            (let* ((c (preceding-char))
+                   (face
+                    (cond ((= c ?*) 'info-title-1)
+                          ((= c ?=) 'info-title-2)
+                          ((= c ?-) 'info-title-3)
+                          (t        'info-title-4))))
+              (put-text-property (match-beginning 1) (match-end 1)
+                                 'font-lock-face face))
+            ;; This is a serious problem for trying to handle multiple
+            ;; frame types at once.  We want this text to be invisible
+            ;; on frames that can display the font above.
+            (when (memq (framep (selected-frame)) '(x pc w32 ns))
+              (add-text-properties (1- (match-beginning 2)) (match-end 2)
+                                   '(invisible t front-sticky nil rear-nonsticky t))))))
 
       ;; Fontify cross references
       (goto-char (point-min))