Tools inheriting from MutatingCommand print out the change they are going to
make and then ask the user to confirm that this is indeed what they wanted to
do.
The change is outputted as a list of updated values in the form
key -> [oldValue, newValue]
e.g.
dnsPaused -> [true, false]
This CL will change the output to be clearer:
key: oldValue -> newValue
e.g.
dnsPaused: true -> false
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=170853745