Incorrect regexp pattern \\\ in method Presenter::formatLayoutTemplateFiles()

[SlavaAurim]

Version: 3.3.0

Bug Description

Incorrect preg_match pattern for checking $this->layout

Steps To Reproduce

PhpStrom show warning for code preg_match('#/|\\\#', $this->layout) - illegal escape sequence
in method Presenter::formatLayoutTemplateFiles():

application/src/Application/UI/Presenter.php

Line 561 in e6c304f

if (is_string($this->layout) && preg_match('#/|\\\#', $this->layout)) {

Expected Behavior

There should be no warnings.

Possible Solution

There should probably be 4 backslashes in the pattern:
preg_match('#/|\\\\#', $this->layout)

See the docs: https://www.php.net/manual/en/regexp.reference.escape.php