ENH: A bit more verbose error message.

src/caosadvancedtools/models/parser.py

@@ -294,7 +294,12 @@ class Parser(object):
         self._check_and_convert_datatypes()
 
         for name, entity in ymlmodel.items():
-            self._treat_entity(name, entity, line=ymlmodel["__line__"])
+            try:
+                self._treat_entity(name, entity, line=ymlmodel["__line__"])
+            except ValueError as err:
+                err_str = err.args[0].replace("invalid keyword:",
+                                              f"invalid keyword in line {entity['__line__']}:", 1)
+                raise ValueError(err_str, *err.args[1:]) from err
 
         return DataModel(self.model.values())