So I have gotten around to looking at this and I have a few questions.
When pasting code it appears to default to
which I assume is for the google prettify module. The problem is that I have not got that module switched on, so therefore should not be added to me pre class at all.
I blogged about this problem, where modules are switched off and yet still run on the interceptors as being a potential problem. This is a perfect example of this being a problem, well not a problem really but it should not be there if the module is switched off.