Fix pylint errors
fix docstring of modules.file.diskusage()
can't fix without affecting api
allow 'bar' as var name, in context of progress bars
safe due to ininstance checks
Merge pull request #18684 from rallytime/pylint_fixes

Fix pylint errors
Merge pull request #18695 from cvrebert/patch-2

fix docstring of modules.file.diskusage()
Merge branch 'develop' into with-pylint-pragmas