engine: return nil from dry run when no changes #171
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The `command` output actually relies on `nil` being return when there are no changes, and I forgot to add that behaviour to dry run which made there be no message printed out for confirmation. Also decided to make a slight change to the confirmation message so that it outputs nothing when the `-quiet` flag is enabled. Signed-off-by: braydonk <braydonk@google.com>
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The
commandoutput actually relies onnilbeing return when there are no changes, and I forgot to add that behaviour to dry run which made there be no message printed out for confirmation.Also decided to make a slight change to the confirmation message so that it outputs nothing when the
-quietflag is enabled.