Having started to become more active on Magento StackExchange from being a regular contributor at Stackoverflow I can say for a fact that the quality of the content on this site is terrible. I often see posts that have not been proof read, have terrible English or are riddled with grammatical errors, or are covered with seemingly random formatting (bold and code blocks) which appear to be trying to emphasize certain points.
If users want to take time to improve the quality of this site, let them. If they don't have enough reputation to do it without having their edits reviewed, that's why the higher rep users review them. There's probably more of a problem in that mid-rep users (1-5k often) tend to blast through a review queue and accept or decline something without paying any attention to what it's doing, in which case seeing a very minor edit might appear to some as not worthy of approval. These users often do this to achieve badges.
At the end of the day, +2 reputation for an edit that improves the quality of a post is well spent.
Now: the context of that particular revision that you've linked to is obviously a waste of everyone's time.