add label to LicenseField

lib/licensee/license_field.rb

@@ -45,5 +45,11 @@ module Licensee
 
     alias key name
     FIELD_REGEX = /\[(#{Regexp.union(LicenseField.keys)})\]/
+
+    # The human-readable field name
+    def label
+      key.sub('fullname', 'full name').capitalize
+    end
+    alias to_s label
   end
 end

spec/licensee/license_field_spec.rb

@@ -53,11 +53,27 @@ RSpec.describe Licensee::LicenseField do
   it 'stores and exposes values' do
     field = described_class.new('foo', 'bar')
     expect(field.name).to eql('foo')
+    expect(field.key).to eql('foo')
     expect(field.description).to eql('bar')
   end
 
+  it 'returns the field label' do
+    field = described_class.new('foo', 'bar')
+    expect(field.label).to eql('Foo')
+  end
+
   it "doesn't error for licenses without bodies" do
     other = Licensee::License.find('other')
     expect(other.fields).to be_empty
   end
+
+  it 'converts fullname to two words' do
+    field = described_class.new('fullname', 'foo')
+    expect(field.label).to eql('Full name')
+  end
+
+  it 'returns the label for #to_s' do
+    field = described_class.new('foo', 'bar')
+    expect(field.to_s).to eql('Foo')
+  end
 end