Let's extend the section of the documentation where we show the usage of the @ token to pass contents of a file into a command's option, so that we mention that it needs to be escaped in PowerShell, which by default uses the @ token for splatting.

Original issue:

I hate it when I miss the little stuff, escaping the '@' did it.

m365 aad app add --manifest `@testmanifest.json

Thanks!

Originally posted by @jacobsian-del in #3234 (comment)