PO::export_entry( Translation_Entry $entry )

	public static function export_entry(&$entry) {
		if ( null === $entry->singular || '' === $entry->singular ) return false;
		$po = array();
		if (!empty($entry->translator_comments)) $po[] = PO::comment_block($entry->translator_comments);
		if (!empty($entry->extracted_comments)) $po[] = PO::comment_block($entry->extracted_comments, '.');
		if (!empty($entry->references)) $po[] = PO::comment_block(implode(' ', $entry->references), ':');
		if (!empty($entry->flags)) $po[] = PO::comment_block(implode(", ", $entry->flags), ',');
		if ($entry->context) $po[] = 'msgctxt '.PO::poify($entry->context);
		$po[] = 'msgid '.PO::poify($entry->singular);
		if (!$entry->is_plural) {
			$translation = empty($entry->translations)? '' : $entry->translations[0];
			$translation = PO::match_begin_and_end_newlines( $translation, $entry->singular );
			$po[] = 'msgstr '.PO::poify($translation);
		} else {
			$po[] = 'msgid_plural '.PO::poify($entry->plural);
			$translations = empty($entry->translations)? array('', '') : $entry->translations;
			foreach($translations as $i => $translation) {
				$translation = PO::match_begin_and_end_newlines( $translation, $entry->plural );
				$po[] = "msgstr[$i] ".PO::poify($translation);
			}
		}
		return implode("\n", $po);
	}