Should you tell a user that they should change x & y in their post in a comment or just do the edit for them.
For example, quoting an answer I just now stumbled by contained originally:
I think what you are looking for is antijoke (http://en.wikipedia.org/wiki/Anti-humor).
with the comment
This could be a good answer if you took some relevant parts of the wiki article (or other places where anti-humor is discussed), and pasted them in a “quote box” to bolster your suggestion.
or a recent case where I referred to a spec and a user complained about me not having linked the spec. I will post my thoughts in an answer, but do feel free to disagree of course, might very well be that there is some official policy in this regard I am not aware of.