message: refactor(api): Modify the labware load error message
diff: @@ -1203,6 +1203,18 @@ def _get_standard_labware_definition(
  checked_version = 1
  else:
  checked_version = version
  + error_msg_string = """Unable to find a labware
  + definition for "{0}",
  + version {1}, in the {2} namespace.
  + Please confirm your protocol includes the correct
  + labware spelling and (optionally) the correct version
  + number and namespace.
  +
  + If you are referencing a custom labware in your
  + protocol, you must add it to your Custom Labware
  + Definitions Folder from the Opentrons App before
  + uploading your protocol.
  + """
  if namespace is None:
  for fallback_namespace in [OPENTRONS_NAMESPACE, CUSTOM_NAMESPACE]:
  @@ -1211,10 +1223,9 @@ def _get_standard_labware_definition(
  load_name, fallback_namespace, checked_version)
  except (FileNotFoundError):
  pass
  - raise FileNotFoundError(
  - f'Labware "{load_name}" not found with version {checked_version}. '
  - f'If you are using a namespace besides {OPENTRONS_NAMESPACE} or '
  - f'{CUSTOM_NAMESPACE}, please specify it')
  +
  + raise FileNotFoundError(error_msg_string.format(
  + load_name, checked_version, OPENTRONS_NAMESPACE))
  namespace = namespace.lower()
  def_path = _get_path_to_labware(load_name, namespace, checked_version)
  