serialise as plain text for valueInfo

Author: colombod

src/Microsoft.DotNet.Interactive.Jupyter/CommandEvents/LanguageHandlers/python/coe_comm_handler.py

@@ -73,13 +73,12 @@ def __handle_request_value_infos(self, command):
                 valueType = str(type(variables[x]))
                 if (x in variables and valueType not in self.__exclude_types):
                     try:
-                        formattedValue = FormattedValue.fromValue(variables[x])
+                        formattedValue = FormattedValue('text/plain+summary', f'{variables[x]}')
                         results.append(KernelValueInfo(x, formattedValue, valueType))
                     except Exception as error: 
                         self. __debugLog('failed creating formattedValue for ' +x+ ' of type ' +valueType, error)
                         pass
 
-
             return EventEnvelope(ValueInfosProduced(results), command)
 
         def __handle_request_value(self, command):