SystemVerilog queue support

[mvanrompuy]

Hi,

I'm having issues when highlighting SystemVerilog code which contains queues. Pygments is unable to correctly highlight the queues syntax.

The following code fails to highlight due to the presence of the dollar sign:

string input_content [$];

But this line of code does adhere to the SV LRM:

[Anteru]

Fixed by 6a3395d