Tab Auto Completion of History Commands for PowerShell

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PowerShell has the capability of Tab auto completion. Moreover, it also remind you the last used parameters and commands in the history as grayed out text. However, Tab cannot auto-complete these grayed-out words - they are there as the reminder to guide your typing. There are two commands to run for enabling the tab completion on these parameters/commands.

Set-PSReadlineKeyHandler -Key UpArrow -Function HistorySearchBackward
Set-PSReadlineKeyHandler -Key DownArrow -Function HistorySearchForward