cleanup: if !object.nil? -> if object
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@ -164,7 +164,7 @@ class Conference < ActiveRecord::Base
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def cfp_open?
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today = Date.current
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cfp = self.call_for_paper
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if !cfp.nil? && (cfp.start_date.. cfp.end_date).cover?(today)
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if cfp && (cfp.start_date.. cfp.end_date).cover?(today)
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return true
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end
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