Using "package" ansible module make the ansible playbook able to run
against most unix OSes. Pacman module only works with Arch and derivatives.
Also : changing state from "latest" to "present". Ansible should not be
a way to keep your system up-to-date : it's a configuration management
system and, as such, should not change anything if neither the playbook
nor the machine changed its state (idempotency).
Reference : https://github.com/ansible/ansible-lint/blob/master/lib/ansiblelint/rules/PackageIsNotLatestRule.py#L24
Fix various code blocks in the docs
- rst markup: put codeblock markup on separate line to make it better visible / separate it from normal text colons.
- borg help texts in archiver.py: put codeblock markup instead of colon - that way it looks like a single colon when using the cli help and also works as code block markup.
