I was using world editor when

i hit something... and it all looked like this.... How can i change it back to normal?

It's showing the raw data. Either press "Ctrl+D" or do it from the menu by selecting "View" then "Display Valves As Raw Data"

this is a odd and something I have never ever seen before.

They're the raw codes for abilities / units / doodads etc. If you don't want to manually insert numbers in tooltips for spells and such you can use them instead. <(RawCode),(DataField)> For exmaple Blizzard's rawcode is AHbz and the datafield for say it's max damage is DataF so to display the max damage for lv 1 of blizzard in a tooltip you would put <AHbz,DataF1> . If you change the 1 to 2 then you'd get the max damage for lv 2 and so on. Also by right-clicking on the first field for the tooltip and using auto-fill with 1 as a contast factor it'll automatically fill out the other tooltip slots.