Isn’t expansion comparable to speed instead of acceleration? If the universe is expanding, i.e., already spreading in all kinds of directions constantly, wouldn’t slower expansion mean deceleration? But I guess you meant the same with “eventual collapse later, but probably not now”.

If it’s slowing down right now instead of expanding what was previously observed, that actually means that there was quite a force to get it into the other direction. Or am I misinterpreting things?

Wait, isn’t there an offline copy of a part of Wikipedia? The article Just by yourself a nice printer with enough ink and do it yourself ;)