Ensure regex starts with "/" and ends with "/"

[aik099]

The code, that transforms regex rule into a JavaScript assumes it starts with / and ends with /. In PHP however there are no such restriction. This way if somebody adds new regex rule using different delimiters it would result in JavaScript error.

I see following options:

• either enforce specific delimiter usage (the / specifically) - easier to do, but eposes fact, that JavaScript is generated inernally
• or replace used delimiter with / when converting to JavaScript - better, but would require escaping new delimiter inside regex as well