I am not skilled with their format, but I did in fact write a revision and submitted it. No clue what became of it.
(The specific entry made reference to Mass. congressman Peter Blute's radio career, in which a brief but egregious remark was made against him.)
You should go and see what they did.
Once you submit revisions, they appear immediately. So long as no one else has changed it, then it's still there. You should go check and report back!
PS. I commonly edit Wikipedia for grammar and spelling, but I've never added anything substantive. I've thought about it though, but the topics I considered modifying would've required some research, and I was too busy. I would never modify if for ideological reasons, but that's just me. I think Wikipedia's a great concept at least in principle.