I've seen a large increase in the number of edit suggestions from question askers (especially low-rep question askers) that are really intended to be comments on an answer, rather than an edit. In some cases the comments are extended, include additional information, and would best be edits to the original question.
I suggest that a hint be provided to low-rep question owners if they go to edit an answer, something to the effect of
Are you commenting on this answer? If so, please use the comments feature. If this answer partially helps you but you need to provide additional information, please update your question to include this additional information and leave a comment on this answer to indicate your updates.
These are some recent examples: