Clarify msg argument to TracebackHandler.abort

Author: domdfcoding

consolekit/tracebacks.py

@@ -100,6 +100,7 @@ def abort(self, msg: Union[str, List[str]]) -> "NoReturn":
 		.. versionadded:: 1.4.0
 
 		:param msg: The message to write to stderr before raising the exception.
+			If a list of strings the strings are concatenated (i.e. ``''.join(msg)``).
 		"""
 
 		if isinstance(msg, str):