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.

首先定位处理 PowerShell 命令参数的分析器入口点。使用两个共享此前缀的参数重现 Get-Foo -R 场景，然后确定预期的警告行为，并为不完整和有歧义的参数名称添加覆盖测试。