Fix exception when writing messages

[jackpoz]

Type

• Bug Fix
• New Feature
• Sample

Related Issues?

Fixes #2185

What is in this Pull Request ?

Fix a "Index out of range" exception when writing messages to ConsoleHost with a Window width less than 8.
This happens in Azure Automation Runbooks as cmdlet.Host.UI.RawUI.MaxWindowSize.Width is set to 0, but happens also locally when setting a Width of 7.

#Investigation
I added some logs to WordWrap to see how the "Index out of range" exception was thrown and it was caused by passing maxLineLength parameter with value -8 , calling text.LastIndexOfAny(... , startIndex: -8) which is invalid

This means cmdlet.Host.UI.RawUI.MaxWindowSize.Width is set to 0 in Azure Automation, which makes sense as there is no UI.
I was able to trigger the same exception locally setting the Window Size of PowerShell 7.1 to 7 pixels:

The error is more readable when expanding the window after having triggered the exception:

#Tests
After excluding the logic of special formatting in case of a too small window, this is how it looks:

Width 120:

Width 9:

Width 7:

After expanding the window:

Testing it in Azure Automation connections correctly, see the output of Get-PnPDiagnostics with no exception and a connection to a site: