Fix tutorial typo

[kurmanka]

Very small IoTutorial.html and IoGuide.html fixes, including a fix for the now-deprecated slice method. (documenting exSlice instead.)

[stevedekorte]

Thank you Ivan :)

[stevedekorte]

Thank you Ivan :)

[kurmanka]

You are welcome. That is my tiny 'thank you' for the awesome Io.

The other thing that needs to be fixed in the tutorial and the guide is how Io interpreter is shown to print literal string values. It is currently documented to print it in double quotes, while the current io version seems to do that without quotes. It is probably a minor issue, and one has to go through the whole content to fix it. I can create an issue for that, if that makes sense.

[kurmanka]

You are welcome. That is my tiny 'thank you' for the awesome Io.

The other thing that needs to be fixed in the tutorial and the guide is how Io interpreter is shown to print literal string values. It is currently documented to print it in double quotes, while the current io version seems to do that without quotes. It is probably a minor issue, and one has to go through the whole content to fix it. I can create an issue for that, if that makes sense.