From old bugtracker, Sam:
Be able to mark a change to a guide or fix as trivial to prevent it from showing up on everyone's feed when you fix a typo. Probably disallow trivial if the difficulty, completeness or impact changes.
SixLinks Developers' response:
This is really about updates to guides. Since any similar updates within 15 minutes are auto-ignored, I'm not sure if this still makes sense. Design decision someday soon.