This is a good thing to keep in mind, but in this case, the patent really does appear to be about that vague as far as I've been able to find anyone explainng. The only difference from the title is that the patent requires the contextual action to have been automatically generated based on the content (it does not, however, detail any method for this "automatically generate" step).

It seems to me that Ward Cunningham's WikiWikiWeb ought to be prior art, but maybe there's a technicality I'm missing, because that seems like a big one for the lawyers to miss.