fix: add whitespace between label and statement

[jtkiesel]

What changed with this PR:

Labeled statements are now printed with a space between the label and the statement.

Example

Input

class Example {

  void labeledForLoop() {
    label:for (int i = 0; i < 1; i++) {}
  }

  void labeledBlockStatement() {
    label:{
      example();
    }
  }
}

Output

class Example {

  void labeledForLoop() {
    label: for (int i = 0; i < 1; i++) {}
  }

  void labeledBlockStatement() {
    label: {
      example();
    }
  }
}

Relative issues or prs:

Closes #686