Confusing error message when calling with incorrect log level

[tobiiasl]

When calling minlog e.g. like this:

  logger.log('foo');

there will be an error thrown stating:
Error: Unknown level name . Known: time,fatal,verbose,silly,emergency,alert,critical,error,warning,notice,informational,debug,warn,info,trace.

The log level used is not specified in the error message (which seems to be the intention).

[andreineculau]

@tobiiasl using 0.8.7 (latest)? i added a test, but it I don't see the missing "foo" (level name)