Syntax highlighting seems to have been broken recently. For example see the code example at:
All the attributes' first letters are black. Is this a bug?
... or a feature?
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You'll have to wait for the next public release of google prettify. I don't see one up there yet, only the trunk copy.
Meta users asked me to put in the latest prettify, I did, and now meta users are complaining about it.
So in the future, no updates until prettify has a public release.
OK, I deployed the latest prettify (no public release in sight, so the trunk.)