improve public Testament docs (#15710)
improve public Testament docs (#15710)

* improve glob docs

* punctuation

* move spec descriptions above example

notably, change the description of timeout to reference seconds, not microseconds

* document nimout

* document sortoutput

* explain the action options
dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim