TIMDEX citation to sym

Author: JPrevost

app/models/normalize_timdex_record.rb

@@ -14,7 +14,7 @@ def normalize
       year:,
       format:,
       links:,
-      'citation' => citation,
+      citation:,
       'identifier' => identifier,
       'summary' => summary,
       'publisher' => publisher,

test/models/normalize_timdex_record_test.rb

@@ -99,12 +99,12 @@ def minimal_record
   test 'normalizes citation' do
     normalized = NormalizeTimdexRecord.new(full_record, 'test').normalize
     assert_equal 'Smith, J. & Doe, J. (2023). Sample TIMDEX Record for Testing. Test Repository.',
-                 normalized['citation']
+                 normalized[:citation]
   end
 
   test 'handles missing citation' do
     normalized = NormalizeTimdexRecord.new(minimal_record, 'test').normalize
-    assert_nil normalized['citation']
+    assert_nil normalized[:citation]
   end
 
   test 'normalizes identifier' do