Fixed the `matches` operator code example
Fixed the `matches` operator code example

It wasn't working because the backslashes themselves needed to be escaped by additional backslashes. Also switched to using forwardslashes for the regex delimiters rather than curly brackets.

hhamon/Twig,bocharsky-bw/Twig,twigphp/Twig,robregonm/Twig,iKwinto/Twig,fsw/Twig,jamessingizi/Twig,hason/Twig,hason/Twig,framewr/Twig,robregonm/Twig,Tobion/Twig,hhamon/Twig,Rvanlaak/Twig,fsw/Twig,huang53798584/Twig,gencer/Twig,craue/Twig,loi-chuanoi/Twig,nicolas-grekas/Twig,derickr/Twig,gamernetwork/Twig,znerol/Twig,hhamon/Twig,bocharsky-bw/Twig,znerol/Twig,Rvanlaak/Twig,gamernetwork/Twig,robregonm/Twig,Rvanlaak/Twig,moltin/Twig,iKwinto/Twig,moufmouf/Twig,nicolas-grekas/Twig,moltin/Twig,fsw/Twig,dkarvounaris/Twig,moufmouf/Twig,derickr/Twig,twigphp/Twig,jamessingizi/Twig,bocharsky-bw/Twig,apishka/templater,Tobion/Twig,derickr/Twig,hason/Twig,twigphp/Twig,nicolas-grekas/Twig,gencer/Twig,huang53798584/Twig,framewr/Twig,nicolas-grekas/Twig,jamessingizi/Twig,craue/Twig,iKwinto/Twig,gamernetwork/Twig,dkarvounaris/Twig,huang53798584/Twig,moltin/Twig,dkarvounaris/Twig,Tobion/Twig,apishka/templater,nicolas-grekas/Twig,znerol/Twig,framewr/Twig,moufmouf/Twig