The module expects a list of strings in the `name` parameter,
but long-standing documentation showed space- and comma-delimited
lists as a valid way of telling the module to act on multiple
packages. Passing these lists through to the `pkg` command can
have unexpected side-effects of upgrading packages when
`state=present` rather than `state=latest` and could result
in the module reporting the wrong number of packages for each
action performed.
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