Warn on using incomplete parameter name

You open your script up to a future breaking change if you use a command parameter and not specifying the full parameter name. For instance, say I use Get-Foo -R in Foo module v1 where Get-Foo has only one switch parameter -Recurse. This works until Foo v2 comes out and the author has add a new parameter to Get-Foo called -Rollback. Now all of a sudden that script with Get-Foo -R will start failing due to an ambiguous parameter name.

首先定位處理 PowerShell 命令參數的分析器進入點。使用兩個共用該前綴的參數重現 Get-Foo -R 情境，然後判斷預期的警告行為，並為不完整且有歧義的參數名稱增加覆蓋測試。