"set" vs "et" under CatOS?

[Gregory Bell]

We're seeing occasional diffs like this:

> <snip>
>  set trunk 6/46 auto dot1q 1-1005,1025-4094
>  set trunk 6/47 auto dot1q 1-1005,1025-4094
>  set trunk 6/48 auto dot1q 1-1005,1025-4094
> + et spantree bpdu-guard 6/1-48 default
> + et spantree portinstancepri 6/32 0 mst  set port gvrp 6/1-48  disable
>  set gvrp registration normal   6/1-48
>  set gvrp applicant normal   6/1-48 
> <snip>

Has anyone else encountered CatOS diffs with lines that begin "et..."?

- Greg Bell