T5812: report actual number of revisions instead of max (backport #2613)

[mergify]

This is an automatic backport of pull request #2613 done by Mergify.
Cherry-pick of ccbf03f has failed:

On branch mergify/bp/sagitta/pr-2613
Your branch is up to date with 'origin/sagitta'.

You are currently cherry-picking commit ccbf03f1a.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   python/vyos/config_mgmt.py

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[sever-sever]

Needs to rebase it after merging #2615

[sever-sever]

@Mergifyio rebase

[mergify]

rebase

☑️ Nothing to do

• -conflict [:pushpin: rebase requirement]
• -closed [:pushpin: rebase requirement]