MCPC 1.12 Functions Not Working After Editing .mcfunctions File Mac

When I made a function in the data file of my world, (and folder) it would not work (possibly because I used an rtf then a txt file) but once I made it a mcfunctions file, it worked! Also, it had nothing in it. When I edited it, it didn't work! it just broke! See ScreenShots below (chronologic order, go from 6.04.03 - 6.04.40)