minor correction in Tutorial1.lua

The text made reference to a code box on the left, when it's actually on the right.
minor correction in Tutorial2.lua

The text made reference to a code box on the left, but it's actually on the right.
minor correction in Tutorial4.lua

The text made reference to a code box on the left, but it's actually on the right.
Merge pull request #61 from BozoDel/master

minor tutorial corrections