Fix for PSUseConsistantWhiteSpace when using statement is present

[AlexandraDorey]

PR Summary

The addition of an using statement can cause the PSUseConsistant white space to fail due to how the InternalVisit of the UsingStatementAst is implemented in a slightly different way than other ASTs. See issue 2089 for more details.

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Change is not breaking
• Make sure all .cs, .ps1 and .psm1 files have the correct copyright header
• Make sure you've added a new test if existing tests do not effectively test the code changed and/or updated documentation
• This PR is ready to merge and is not Work in Progress.
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[AlexandraDorey]

@microsoft-github-policy-service agree

[andyleejordan]

Hey cool, good debugging. Read through your issue, I think you're right and this makes sense. Just approved the tests workflow.

[bergmeister]

Thanks, well done

[AlexandraDorey]

Fixed the nits up, I'm not super familiar with github but I assume I can merge my commits into one commit when the PR merges or should I do that in by branch first? Otherwise should be good to merge once the tests run again :)

[andyleejordan]

Sure can!