Add tests for powershell -? parsing
Add tests for powershell -? parsing

And all other accepted forms.

PaulHigin/PowerShell,daxian-dbw/PowerShell,daxian-dbw/PowerShell,KarolKaczmarek/PowerShell,jsoref/PowerShell,KarolKaczmarek/PowerShell,TravisEz13/PowerShell,KarolKaczmarek/PowerShell,bmanikm/PowerShell,bingbing8/PowerShell,JamesWTruher/PowerShell-1,PaulHigin/PowerShell,bingbing8/PowerShell,jsoref/PowerShell,kmosher/PowerShell,daxian-dbw/PowerShell,PaulHigin/PowerShell,jsoref/PowerShell,bingbing8/PowerShell,TravisEz13/PowerShell,JamesWTruher/PowerShell-1,JamesWTruher/PowerShell-1,bmanikm/PowerShell,kmosher/PowerShell,bmanikm/PowerShell,KarolKaczmarek/PowerShell,PaulHigin/PowerShell,jsoref/PowerShell,kmosher/PowerShell,TravisEz13/PowerShell,kmosher/PowerShell,bingbing8/PowerShell,KarolKaczmarek/PowerShell,jsoref/PowerShell,bmanikm/PowerShell,JamesWTruher/PowerShell-1,bingbing8/PowerShell,daxian-dbw/PowerShell,kmosher/PowerShell,bmanikm/PowerShell,TravisEz13/PowerShell