fix importmagic/epc failure ("from decorator import decorator" failed…

… when using ipython3)

See (epc:pop-to-last-server-process-buffer) and ipython/ipykernel#40

init.el

@@ -1082,7 +1082,7 @@ This function is called at the very end of Spacemacs initialization."
  '(flycheck-python-mypy-executable "python3")
  '(flycheck-python-pycompile-executable "python3")
  '(flycheck-python-pylint-executable "python3")
- '(importmagic-python-interpreter "ipython3")
+ '(importmagic-python-interpreter "python3")
  '(major-mode 'text-mode)
  '(minimap-update-delay 0)
  '(minimap-window-location 'right)