Unnecessary default values in help of some commands

profile-edit --help states:

--set

                Set or create values (selected by default).

                (defaults to true)

IMHO the "defaults to true" is not necessary there because you can't explicitly set "set" to false (you can do it with the use of "--delete").

The same applies to zk:delete:

-v, --version 

                The ZooKeeper version to delete. By default, delete all versions.

                (defaults to -1)

The "defaults to -1" is in my opinion duplicate as the sentence before states that by default is deletes from all versions