VED-350: Add return Type to prevalidation function and remove trailing white space

Author: Akol125

backend/src/models/utils/pre_validator_utils.py

@@ -199,9 +199,9 @@ def for_integer_or_decimal(field_value: Union[int, Decimal], field_location: str
     def require_system_when_code_present(
         code_value:str, 
         system_value:str,
-        code_location,
-        system_location,
-        ):
+        code_location:str,
+        system_location:str,
+        ) -> None:
         """
         If code is present (non-empty), system must also be present (non-empty).
         """

backend/tests/utils/values_for_tests.py

@@ -60,7 +60,7 @@ class ValidValues:
         {"value": 2, "unit": "ml", "system": "http://snomed.info/sct", "code": "258773002"},
         {"value": 4, "unit": "ml", "system": "http://snomed.info/sct"},
         {"value": 5, "unit": "ml" }
-        ]
+    ]
 
     manufacturer_resource_id_Man1 = {"resourceType": "Manufacturer", "id": "Man1"}
 
@@ -386,4 +386,4 @@ class InvalidValues:
     ]
 
     invalid_dose_quantity = {"value": 2, "unit": "ml", "code": "258773002"}
-    
+