[mpi3-coll] specified in or implied by

[Adam Moody]

Several folks mentioned that this line in the NBC intro is wordy:
    "Completion does not imply that other processes have completed or 
even started the operation unless otherwise specified in, or implied by, 
the description of the operation."
I think a good solution here is to borrow from the existing collectives 
intro (see below).
-Adam

 From p 2, lines 22-24 we have
    "It does not indicate that other processes in the group have 
completed or even started the operation (unless otherwise implied by in 
the description of the operation)."

First, drop the extra preposition in this text (typo from original)
    "implied by in"  -->  "implied by"

Second, borrow this wording for NBC on p 50, lines 7-8.
Change:
    "Completion does not imply that other processes have completed or 
even started the operation unless otherwise specified in, or implied by, 
the description of the operation."
To:
    "Completion does not indicate that other processes have completed or 
even started the operation (unless otherwise implied by the description 
of the operation.)"