Make module formatting not generate error with strict mode

[jazzdelightsme]

Fixes #11909

PR Summary

Minor tweak to module formatting script to avoid errors when strict mode is on.

PR Checklist

• PR has a meaningful title
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• Summarized changes
• Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header
• This PR is ready to merge and is not Work in Progress.
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• Breaking changes
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  • Experimental feature(s) needed
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• User-facing changes
  • Not Applicable
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  • Documentation needed
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• Testing - New and feature
  • N/A or can only be tested interactively
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• Tooling
  • I have considered the user experience from a tooling perspective and don't believe tooling will be impacted.
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  • I have considered the user experience from a tooling perspective and enumerated concerns in the summary. This may include:
    • Impact on PowerShell Editor Services which is used in the PowerShell extension for VSCode (which runs in a different PS Host).
    • Impact on Completions (both in the console and in editors) - one of PowerShell's most powerful features.
    • Impact on PSScriptAnalyzer (which provides linting & formatting in the editor extensions).
    • Impact on EditorSyntax (which provides syntax highlighting with in VSCode, GitHub, and many other editors).

[jazzdelightsme]

@SteveL-MSFT Quickest way to get me using a pre-release build would be to ship this change in one. ;)

[TravisEz13]

@SteveL-MSFT Can you update your review?

[ghost]

This pull request has been automatically marked as Review Needed because it has been there has not been any activity for 7 days.
Mainainer, Please provide feedback and/or mark it as Waiting on Author

[TravisEz13]

pinged @SteveL-MSFT offline to update his review

[SteveL-MSFT]

Sorry for the delay!

[ghost]

🎉v7.1.0-preview.4 has been released which incorporates this pull request.:tada:

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