Update piping alias section for clarity

[c-git]

Clarify that aliases do not support multiple commands and provide examples for defining commands without parameters.

[c-git]

Will try to clean it up a bit after work today. Too tired to ensure it's clear right now.

[c-git]

I went back over it but needed to make more changes so might be best to come back to it again.

[c-git]

Still ended up making another change, so will try again another time to read it over.

Once I'm finally done, do I need to squash the commits or will you squash on merge?

[c-git]

Considered capitalizing "not" in the first change but decided against it as I think it's clear enough and thus made no changes and I think it's ok as is. Let me know if anything could be improved.

Extract of the line I considered changing (with the change made) in case it would improve clarity or readability.

Note aliases currently do NOT support including multiple commands. So for example alias uuidgen = uuidgen | tr A-F a-f (to make uuidgen on mac behave like linux) won't work.
The solution is to define a command without parameters that calls the system program uuidgen via ^.