Describe the Bug

Using $temProc->deleteBlock('test_hide_blk'); to delete a block but when trying to open file Word reports that file is corrupt.
Looking at the document.xml the parser is missing part of the xml in the removal.

Steps to Reproduce

$temProc = new \PhpOffice\PhpWord\TemplateProcessor("/path/to/template.docx");
$temProc->deleteBlock('test_hide_blk');

template.docx =
${test_hide_blk}
Some text to remove.
${/test_hide_blk}

Expected Behavior

That my test_hide_blk block is removed in a usable document.

Current Behavior

Block is only partially removed with a corrupt doc.

Context

• PHP Version: 7.2
• PHPWord Version: 0.18

I can fix this by copying the preg_match from cloneBlock into replaceBlock.

public function replaceBlock($blockname, $replacement)
{
$matches = array();
// preg_match( // previous preg_match
// '/(<?xml.)(<w:p.>${' . $blockname . '}</w:.?p>)(.)(<w:p.${/' . $blockname . '}</w:.?p>)/is',
// $this->tempDocumentMainPart,
// $matches
// );
preg_match( // from cloneBlock
'/(<?xml.)(<w:p\b.>${' . $blockname . '}</w:.?p>)(.)(<w:p\b.${/' . $blockname . '}</w:.?p>)/is',
$this->tempDocumentMainPart,
$matches
);