Description of problem:

https://docs.openshift.com/container-platform/4.13/registry/configuring-registry-operator.html

Removed: the --prune-registry flag for the image pruner is set to false, meaning it only prunes image metatdata in etcd.

metatdata should be metadata

same issue in 4.14/4.15 doc

Version-Release number of selected component (if applicable):

4.13+

How reproducible:

always

Steps to Reproduce:

1. see the description