(eww-save-history): Don't let the history grow infinitely.

lisp/ChangeLog

@@ -5,6 +5,7 @@
 	variables `eww-current-url', `eww-current-dom',
 	`eww-current-source', and `eww-current-title'.
 	(eww-readable): Copy over pertinent data from the parent page.
+	(eww-save-history): Don't let the history grow infinitely.
 	* net/eww.el: Remove `eww-next-url', `eww-previous-url',
 	`eww-up-url', `eww-home-url', `eww-start-url' and

lisp/net/eww.el

@@ -1344,7 +1344,11 @@ Differences in #targets are ignored."
   (plist-put eww-data :point (point))
   (plist-put eww-data :text (buffer-string))
   (push eww-data eww-history)
-  (setq eww-data (list :title "")))
+  (setq eww-data (list :title ""))
+  ;; Don't let the history grow infinitely.  We store quite a lot of
+  ;; data per page.
+  (when-let (tail (nthcdr 50 eww-history))
+    (setcdr tail nil)))
 
 (defun eww-list-histories ()
   "List the eww-histories."