What do we think of:

• Short answers (for example, "I suggest you use [hyperlink to this standard API] instead.")
• Code-only answers (for example, an improved version of the code in the OP)

Such answers could be improved (e.g. by adding an explanation of why the suggestion is helpful).

Is it required to improve these answers? If I can't easily edit one to improve it, should I:

• Leave it as is?
• Downvote it?
• Upvote it? (if the content is good though the format is lacking)
• Flag it, as "not an answer"?