Used to log formatted messages to the stdout (the console) or to a file. The dateTime argument should be a format string that is accepted by os.date. The file argument should be a relative or absolute file path or nil if no log file is desired. See the logLevel enumeration for acceptable log level values.

log

If the provided level is less than or equal to the log level set on initialization, this logs a message to stdout as defined by Luvit's process module and to a file if one was provided on initialization. The msg, ... pair is formatted according to string.format and returned if the message is logged.

Name	Type
level	number
msg	string
...	*

Returns: string