Document comparison is opposite from expected order

[speedy-sasquatch]

Per the readme, the expected PowerShell call syntax is as follows:
powershell -File Diff-Word.ps1 oldfile.docx newfile.docx
However, the result is the opposite: Word treats newfile as the original and oldfile as the updated. This is because the Word command Document.Compare expects the syntax NewDocument.Compare(OldDocument, ...) but the PowerShell script uses OldDocument.Compare(NewDocument, ...) which explains the inverted result in Word. Unfortunately the correct syntax is very unclear in the Microsoft documentation so the confusion is quite understandable. However, the PowerShell script should align with the correct use of the Word command.