PR Summary

Suggested on the Community Call by Keith Hill (@rkeithhill) to help make important parts of the detailed output of Get-Error to highlight the Exception/ErrorRecord Message as well as the underline for where the error occurred in the PositionMessage member. The change will use the $PSStyle.Formatting.Error color to highlight any property called Message and the ~~~ underline used in a property called PositionMessage. This means that some members may be highlighted unintentionally, but it seems those would be corner cases.

Example:

PR Context

Fix #15783

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
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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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  • Make sure you've added a new test if existing tests do not effectively test the code changed
• Tooling
  • I have considered the user experience from a tooling perspective and don't believe tooling will be impacted.
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    • Impact on PowerShell Editor Services which is used in the PowerShell extension for VSCode
      (which runs in a different PS Host).
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    • Impact on Completions (both in the console and in editors) - one of PowerShell's most powerful features.
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    • Impact on PSScriptAnalyzer (which provides linting & formatting in the editor extensions).
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    • Impact on EditorSyntax (which provides syntax highlighting with in VSCode, GitHub, and many other editors).
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