Automatic variable Input is not described clearly enough

[nyanhp]

The variable $Input once accessed in the process block will be empty since it is an enumerator. Thus the text for all PowerShell editions and versions should be rephrased to clearly reflect that behavior.
The current text simply states that $Input enumerates the current object in the pipeline. It is not immediately clear that unlike $_ or $PSItem it will be empty once read.

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Document Details

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• ID: c21f7153-2a78-37c8-6935-9bf8aac83cea
• Version Independent ID: 901506c9-d895-9a5b-331f-7b332fc5e827
• Content: about_Automatic_Variables
• Content Source: reference/6/Microsoft.PowerShell.Core/About/about_Automatic_Variables.md
• Product: powershell
• GitHub Login: @SteveL-MSFT
• Microsoft Alias: slee