[Code Style] Indentation rules

[kaijchen]

There are 2 indentation styles in the current code base. Which are mostly the same except for line wrapping.
It would be better to have it unified early. How do you think?

4 spaces for line wrapping

public static void main(String[] args)
    throws Exception {
  for (int i = 0; i < args.length; i++) {
    System.out.println("Greeting the " + i +
        "-th argument");
    System.out.println("hello, " + args[i]);
  }
}

2 spaces for line wrapping

public static void main(String[] args)
  throws Exception {
  for (int i = 0; i < args.length; i++) {
    System.out.println("Greeting the " + i +
      "-th argument");
    System.out.println("hello, " + args[i]);
  }
}

[kaijchen]

Personally I prefer the "4 spaces" way, because it differentiates line wrapping with block indents.

[jerryshao]

I'm +1 on 4 spaces for line wrapping.

[kaijchen]

Closed for #56.