Ensure %recall does not show error after argument eval

[MrMino]

Fixes #12946

[MrMino]

Am I reading this correctly? Has darker flipped over on this code?

Run darker -r 60625f241f298b5039cb2debc365db38aa7bb522 --check --diff . || (
Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.8.10/x64/bin/darker", line 5, in <module>
    from darker.__main__ import main
  File "/opt/hostedtoolcache/Python/3.8.10/x64/lib/python3.8/site-packages/darker/__main__.py", line 16, in <module>
    from darker.import_sorting import apply_isort, isort
  File "/opt/hostedtoolcache/Python/3.8.10/x64/lib/python3.8/site-packages/darker/import_sorting.py", line 22, in <module>
    isort_code = getattr(isort, "code")
AttributeError: 'NoneType' object has no attribute 'code'

[ivanov]

The believe that the darker error is caused by isort not being installed

[ivanov]

The believe that the darker error is caused by isort not being installed

now fixed on master, so you won't get any trouble from darker once you rebase.
Happy hacking!