org-capture-finalize: Do not save new file with :no-save aborted capture

* lisp/org-capture.el (org-capture-finalize): Do not save the newly
created file buffer when the capture is aborted and org-capture is not
asked to save upon capture.
* testing/lisp/test-org-capture.el (test-org-capture/abort): Add test.

lisp/org-capture.el

@@ -889,10 +889,16 @@ captured item after finalizing."
 		(goto-char (+ size pos))
 	      (goto-char (if (< ipt pos) (+ size pos) pos))))))
 
+      (if (and base-buffer org-note-abort new-buffer)
+          ;; Unconditionally kill the new buffer when capture is
+          ;; aborted.
+          (with-current-buffer base-buffer
+            (set-buffer-modified-p nil)
+            (kill-buffer))
         ;; Kill the target buffer if that is desired
         (when (and base-buffer new-buffer kill-buffer)
 	  (with-current-buffer base-buffer (save-buffer))
-	(kill-buffer base-buffer))
+	  (kill-buffer base-buffer)))
 
       ;; Restore the window configuration before capture
       (set-window-configuration return-wconf))

testing/lisp/test-org-capture.el

@@ -152,6 +152,18 @@
 
 (ert-deftest test-org-capture/abort ()
   "Test aborting a capture process."
+  ;; Newly create capture buffer should not be saved.
+  (let ((capture-file (make-temp-name
+                       (org-file-name-concat
+                        temporary-file-directory
+                        "org-test"))))
+    (unwind-protect
+        (let ((org-capture-templates `(("t" "Todo" entry (file ,capture-file) nil :no-save t))))
+          (org-capture nil "t")
+          (org-capture-kill)
+          (should-not (file-exists-p capture-file)))
+      (when (file-exists-p capture-file)
+        (delete-file capture-file))))
   ;; Test that capture can be aborted after inserting at end of
   ;; capture buffer.
   (should