private static void merge(PsiLiteralExpression left, PsiLiteralExpression right, StringBuilder newExpression) {
    final String leftText = getLiteralExpressionText(left);
    final String rightText = getLiteralExpressionText(right);
    if (left.isTextBlock()) {
      newExpression.append("\"\"\"\n").append(leftText)
        .append(right.isTextBlock() ? rightText : PsiLiteralUtil.escapeTextBlockCharacters(rightText)).append("\"\"\"");
    }
    else if (right.isTextBlock()) {
      newExpression.append("\"\"\"\n").append(PsiLiteralUtil.escapeTextBlockCharacters(leftText)).append(rightText).append("\"\"\"");
    }
    else {
      newExpression.append('"').append(leftText).append(rightText).append('"');
    }
  }
private static void merge(PsiLiteralExpression left, PsiLiteralExpression right, StringBuilder newExpression)