swh.deposit.api: Update docstring

swh/deposit/api/common.py

@@ -656,7 +656,7 @@ class SWHPostDepositAPI(SWHBaseDeposit, metaclass=ABCMeta):
         Returns:
             204 response when no error during routine occurred.
             400 if the deposit does not belong to the collection
-            404 if the deposit does not exist
+            404 if the deposit or the collection does not exist
 
 
         """
@@ -706,7 +706,7 @@ class SWHPutDepositAPI(SWHBaseDeposit, metaclass=ABCMeta):
         Returns:
             204 response when no error during routine occurred.
             400 if the deposit does not belong to the collection
-            404 if the deposit does not exist
+            404 if the deposit or the collection does not exist
         """
         checks = self._primary_input_checks(req, collection_name, deposit_id)
         if 'error' in checks:
@@ -742,7 +742,7 @@ class SWHDeleteDepositAPI(SWHBaseDeposit, metaclass=ABCMeta):
         Returns:
             204 response when no error during routine occurred.
             400 if the deposit does not belong to the collection
-            404 if the deposit does not exist
+            404 if the deposit or the collection does not exist
 
         """
         checks = self._primary_input_checks(req, collection_name, deposit_id)