<NME> field_spec.rb
<BEF> require 'spec_helper'

describe Field do
  it { should have_many :agreement_fields }
  it { should allow_mass_assignment_of(:label) }
  it { should allow_mass_assignment_of(:data_type) }
  it { should allow_mass_assignment_of(:enabled_by_default) }
end

<MSG> Add Field#description.  Add "Corporate Contributor Information" field.

<DFF> @@ -5,4 +5,5 @@ describe Field do
   it { should allow_mass_assignment_of(:label) }
   it { should allow_mass_assignment_of(:data_type) }
   it { should allow_mass_assignment_of(:enabled_by_default) }
+  it { should allow_mass_assignment_of(:description) }
 end

Add Field#description.  Add "Corporate Contributor Information" field.