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This rather complex function has had stuff tacked on over the years. Help make working with it a bit easier through liberal application of whitespace and some nicer indentation. Some option help text is improved based on changes to modern nova. Change-Id: I8154dd395dd904c3bcd180a7d0f9037b7e0be64f Signed-off-by: Stephen Finucane <sfinucan@redhat.com>