I have been trying to avoid passing non-default arguments to mkfs. We used to pass a
variety of custom arguments, but it doesn't make sense for blivet to default to
behavior the tools consider non-default. The proper way to fix this would be to add proper
support for specifying format options for all format classes.
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To view this pull request on github, visit
https://github.com/rhinstaller/blivet/pull/266