Issue #2863629 by sleitner, jmaties, armrus, ravi.shankar, yogeshmpawar,...

    $arguments['@count'] = $this->count;

    $translated_array = explode(PoItem::DELIMITER, $this->translatedString);

    if ($this->count == 1) {

      return $this->placeholderFormat($translated_array[0], $arguments);

    }

    $index = $this->getPluralIndex();

    if ($index == 0) {

    if ($this->count == 1 || $index == 0 || count($translated_array) == 1) {

      // Singular form.

      $return = $translated_array[0];

    }

    else {

      if (isset($translated_array[$index])) {

        // N-th plural form.

        $return = $translated_array[$index];

      }

      else {

        // If the index cannot be computed or there's no translation, use the

        // second plural form as a fallback (which allows for most flexibility

        // with the replaceable @count value).

        $return = $translated_array[1];

      }

      // Nth plural form, fallback to second plural form.

      $return = $translated_array[$index] ?? $translated_array[1];

    }

    return $this->placeholderFormat($return, $arguments);

  }

    ];

  }

  /**

   * Tests when the plural translation is missing.

   */

  public function testMissingPluralTranslation() {

    $markup = PluralTranslatableMarkup::createFromTranslatedString(2, 'There is no plural delimiter @count');

    $this->assertEquals('There is no plural delimiter 2', $markup->render());

  }

}