Tabs in the repl cause display issues
Just copy something like var abc = 5;
in the repl and go back and forth and remove or add some characters. Push enter and go up and down in the history and further issues will resolve.
The marker is not correct and sometimes things are not visible that should be and the other way around.
I guess we could either just display tabs as space (that would likely resolve the problem easily) or
We have to properly fix this and to teach the code to jump to the correct position if there's a tab.