"get" and "getting" are handled inconsistently

[rspeer]

(from Launchpad bug list)

We have a number of passive concepts, like "get fired" and "getting served". They should be treated differently than their active counterparts, e.g., "fire" and "serve". "getting served" normalizes to "get serve", which seems right, but "get fired" normalizes to "fire".

I suspect "get" is a stopword but "getting" isn't, and stopword removal happens before lemmatization. Fixing this bug will require a test that clearly illustrates the desired behavior lest it break again ;)