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c5e543308b
Automatic merge from submit-queue (batch tested with PRs 55868, 55393, 55152, 55849). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Improve documentation for kubeadm preflight command **What this PR does / why we need it**: This PR is part of the effort for improving kubeadm reference doc (CLI, website, manpages), and more specifically improves documentation for `kubeadm alpha phase preflight` **Which issue(s) this PR fixes**: part of the effort for [#265](https://github.com/kubernetes/kubeadm/issues/265) **Special notes for your reviewer**: The PR has two commits: - `Clone documentation utility from //pkg/kubectl/cmd/templates`, that re-implements in kubeadm some kubectl utilities for handling description and examples for cobra.commands; more PR will follow re-using those utilities. NB. I was forced to add an exception to golint because `blackfriday.Renderer` requires to implement an interface that is not compliant - `kubeadm-doc-preflight` that implements improvement to `kubeadm alpha phase preflight` **Release note**: ```release-note NONE ```