Linter can complain about empty file options due to the presence of extraneous pipes.
Tasks:
- Add code to carry out transformations like this without making any unrelated change to delinter.py: [[File:Example.jpg|thumb||right]] → [[File:Example.jpg|thumb|right]], [[File:Example.jpg|arbitrary||right]] → [[File:Example.jpg|arbitrary|right]] etc.
- Add tests to test_delinter.py