Fixing a typo currently moves a question to the top of the list. Probably it has been discussed on meta.SO, but: if there were a way of doing this a few characters at a time without bumping the post to the top one could incrementally fix all the minor defects without any saltation.
[add: as in the comment, I really mean two thresholds: one a minimum number of characters for bumping based on a single edit, and the other a maximum cumulative "number of edited characters since last bump" count, that triggers a bump when reached. e.g., 4 and 30. There are other numbers that could also be tracked to avoid most exploits.]