Convert to black formatting

app/shared/query/service.py

@@ -1,6 +1,6 @@
 class QueryService:
-    '''An example of a service that is shared'''
+    """An example of a service that is shared"""
 
     @staticmethod
     def execute(query):
-        return 'Success'
+        return "Success"

app/shared/query/service_test.py

@@ -2,6 +2,6 @@ from .service import QueryService
 
 
 def test_execute():
-    result = QueryService.execute('a complicated query')
+    result = QueryService.execute("a complicated query")
 
-    assert result == 'Success'
+    assert result == "Success"