fix: print comment before first binary operator without failing

[jtkiesel]

What changed with this PR:

Binary expressions with comments before the first operator no longer fail to print.

Example

Input

class Example {

  void example() {
    0 //
    + 1;
  }
}

Output

class Example {

  void example() {
    0 + //
    1;
  }
}

Relative issues or prs:

Closes #685