Add missing space in regex

* jupyter-tramp.el (jupyter-tramp--get-directory-or-file-model): Do it.

Author: nnicandro

jupyter-tramp.el

@@ -338,7 +338,7 @@ fails."
        (cl-destructuring-bind (_ code msg) err
          (if (and (eq code 404)
                   (string-match-p
-                   "\\(?:No such \\)?file or directory\\(?:does not exist\\)?"
+                   "\\(?:No such \\)?file or directory\\(?: .*does not exist\\)?"
                    msg))
              (list :path path :name nil
                    ;; If a file doesn't exist we need to check if the