jupyter-load-file doesn't quote filenames

[moneylobster]

Windows allows spaces in filenames. On Windows, sending a jupyter-load-file command to a Python kernel will result a query like %run C:/Hello There/test.py to be evaluated, which causes problems because a python script called C:/Hello doesn't exist. Quoting the filename in jupyter-load-file-code seems to fix the problem:

(cl-defmethod jupyter-load-file-code (file &context (jupyter-lang python))
  (concat "%run \"" file "\"")) ;; instead of (concat "%run " file)

[moneylobster]

Just found out that this is a duplicate of #313 , sending a PR with the relevant change.