change regex instead of checking twice

Author: troosan

src/PhpWord/TemplateProcessor.php

@@ -612,8 +612,7 @@ public function cloneRow($search, $numberOfClones)
                 // If tmpXmlRow doesn't contain continue, this row is no longer part of the spanned row.
                 $tmpXmlRow = $this->getSlice($extraRowStart, $extraRowEnd);
                 if (!preg_match('#<w:vMerge/>#', $tmpXmlRow) &&
-                    !preg_match('#<w:vMerge w:val="continue" />#', $tmpXmlRow) &&
-                    !preg_match('#<w:vMerge w:val="continue"/>#', $tmpXmlRow)) {
+                    !preg_match('#<w:vMerge w:val="continue"\s*/>#', $tmpXmlRow)) {
                     break;
                 }
                 // This row was a spanned row, update $rowEnd and search for the next row.