`service describe` show repetitive revisions if service has multi revisions

[MIBc]

Bug report

If a service has more than three revisons. The 'kn service describe -v' will show repetitive revisions.
Here is a screenshot：

I have read the code.
The reason is that the revison would be covered by next one.
We should use deep copy.

Expected behavior

Show every revision in knative service.

Steps to reproduce the problem

Creating more than three revisions for a knative service.

kn version

v0.13

/kind bug

[dsimansk]

Fixed in PR #790.

/close

[knative-prow-robot]

@dsimansk: Closing this issue.

Details

In response to this:

Fixed in PR #790.

/close

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