[hibbelig]

Well, significant whitespace will play the role of braces, right? You can't have your editor "fix" the braces, either -- the author has to put them in. In the same way, you can't have your editor "fix" the indentation -- the author has to put it in.

But with braces, you can do consistency checks, such as that they are properly nested. In a similar way, you can do consistency checks with indentation. For example:

    line 1
        line 2
      line 3

The third line is wrong, the transition from line 1 to line 2 introduced an indentation step, and the third line is neither left nor right.

[z3t4]

I find adding braces much easier then managing white space though. For example commenting out code, adding branches, removing branches etc.