op/magic.t: Pass more common parameter to ps

[khwilliamson]

-p is an abbreviation that isn't as widely used as -pid

• This set of changes does not require a perldelta entry.

[bulk88]

Not compatible with Commercial Unix.

https://nixdoc.net/man-pages/HP-UX/man1/ps.1.html

PS HPUX's ls app and Linux/GNU's ls app, do not share a single letter in common. IDK why, would want to know the backstory if someone knows the history behind it.

I dont think the POSIX specs have ever touched the topic of command line switches. /bin minimum programs required, maybe, but no spec defines the command line args for each POSIX OS's cmd line args.

[khwilliamson]

You're right; I got it wrong