[JavaScript] Issue with regex empty character class

[ghost]

The following code

console.log(/[]\//.test(""));

is highlighted like a comment. Here [] is empty regex character class which is not allowed in Python and PCRE languages, but in JavaScript it is considered as a valid regex pattern. There is currently no use of it, but it still represents correct syntax.

[Thom1729]

Seems to be fixed by #1009.