Indent output to ofstream.

indentOutput.cpp

void indentedOutput(ostream &outStream, const char *message, bool &newline)
{
  while (char cur = *message) {
    if (newline) {
      outStream << "  ";
      newline = false;
    }
    outStream << cur;
    if (cur == '\n') {
      newline = true;
    }
    ++message;
  }
}