Add changelog and rspec

Author: fcce

CHANGELOG.md

@@ -7,7 +7,7 @@
 #### Fixes
 
 * Your contribution here.
-
+* [#384](https://github.com/ruby-grape/grape-entity/pull/384): Fixed the `inspect` method to correctly handle nil values. - [@fcce](https://github.com/fcce).
 
 ### ### 1.0.1 (2024-04-10)
 

spec/grape_entity/entity_spec.rb

@@ -1769,6 +1769,12 @@ class NoPathCharacterEntity < Grape::Entity
         expect(data).to_not include '@options'
         expect(data).to_not include '@delegator'
       end
+
+      it 'returns a nil string when subject is nil' do
+        data = subject.class.new(nil).inspect
+        expect(data).to include 'nil'
+      end
+
     end
 
     describe '#value_for' do