Fix small typos in test_events.
Fix small typos in test_events.

seabirdzh/disco,simudream/disco,ErikDubbelboer/disco,pombredanne/disco,discoproject/disco,ktkt2009/disco,oldmantaiter/disco,scrapinghub/disco,seabirdzh/disco,mozilla/disco,pavlobaron/disco_playground,scrapinghub/disco,pooya/disco,ktkt2009/disco,mwilliams3/disco,simudream/disco,discoproject/disco,beni55/disco,oldmantaiter/disco,discoproject/disco,pombredanne/disco,discoproject/disco,discoproject/disco,simudream/disco,oldmantaiter/disco,beni55/disco,beni55/disco,ktkt2009/disco,pavlobaron/disco_playground,ErikDubbelboer/disco,pavlobaron/disco_playground,seabirdzh/disco,mwilliams3/disco,scrapinghub/disco,seabirdzh/disco,pooya/disco,mozilla/disco,ErikDubbelboer/disco,pombredanne/disco,pombredanne/disco,pooya/disco,seabirdzh/disco,beni55/disco,ktkt2009/disco,pombredanne/disco,pavlobaron/disco_playground,simudream/disco,ErikDubbelboer/disco,beni55/disco,mozilla/disco,mwilliams3/disco,mozilla/disco,mwilliams3/disco,mwilliams3/disco,scrapinghub/disco,ktkt2009/disco,oldmantaiter/disco,ErikDubbelboer/disco,pooya/disco,oldmantaiter/disco,simudream/disco