Improve search results in docs with short search tokens
Improve search results in docs with short search tokens

Search results with tokens with length <= 2 would fail silently, and not give
the user any explanation as to why they weren't seeing any results. This fix
removes those tokens from the search, and prints a warning to the user that
said tokens have been removed.

kasisnu/calico,nbartos/calico,Metaswitch/calico,Metaswitch/calico,TrimBiggs/calico,matthewdupre/felix,beddari/calico,TrimBiggs/calico,beddari/calico,neiljerram/felix,kasisnu/calico,ocadotechnology/calico,neiljerram/felix,anortef/calico,neiljerram/felix,alexhersh/calico,neiljerram/felix,matthewdupre/felix,anortef/calico,nbartos/calico,alexhersh/calico,ocadotechnology/calico