L2SS-461: Simplified exception message

tangostationcontrol/tangostationcontrol/clients/attribute_wrapper.py

@@ -29,7 +29,7 @@ class attribute_wrapper(attribute):
         # see also https://pytango.readthedocs.io/en/stable/server_api/server.html?highlight=devlong#module-tango.server for
         # more details about type conversion Python/numpy -> PyTango
         if "numpy" not in str(datatype) and datatype != str:
-            raise ValueError(f"Attribute needs to be a Tango-supported numpy or str type, but has type \"{(datatype,)}\"")
+            raise ValueError(f"Attribute needs to be a Tango-supported numpy or str type, but has type {datatype}")
 
         """
         Numpy has a depracated string type called numpy.str_.