update: Clean up whitespace in LRUCache implementation and tests

Author: FarhanAnjum-opti

lib/optimizely/odp/lru_cache.rb

@@ -91,7 +91,7 @@ def peek(key)
 
       @cache_mutex.synchronize { @map[key]&.value }
     end
-  
+
     # Remove the element associated with the provided key from the cache
     #
     # @param key - The key to remove

spec/odp/lru_cache_spec.rb

@@ -173,7 +173,7 @@
     cache.save('1', 100)
     cache.save('2', 200)
 
-    cache.remove('3')  # Doesn't exist
+    cache.remove('3') # Doesn't exist
 
     expect(cache.lookup('1')).to eq 100
     expect(cache.lookup('2')).to eq 200