skipped path can be removed from dirnames twice

[magicl]

In function iter_source_code, if a path is_skipped, and is also in visited_dirs, it will be removed from dirnames twice.

This happens if you have symbolic links in code, causing loops, and then try to disable these links using the "-s" parameter to isort.

Would be good to have an option to isort to prevent following symbolic links as well.

[timothycrosley]

@magicl,

Thanks for reporting this issue! It has been fixed in develop and will be pushed to PyPI in the 5.5.0 release.

Thanks!

~Timothy

[timothycrosley]

This change has just been deployed to PyPI in version 5.5.0

Thanks!

~Timothy