What's the policy when a new person edits a post to add significant info to an answer that wasn't there in the first place. The info isn't wrong per se, it's just a notable chunk that's new.
Here is the added text:
However, manufacturers may recommend that the high pressure line carrying condensed refrigerant should be insulated if that line runs through an attic and the attic temperatures exceed 120 degrees. That is because the liquid line (which, in a properly charged system, should be about 4 degrees above outdoor temperature when it leaves the condensor) will pick up heat as it travels through the hot attic. So all that work the condensor did to remove the heat is now being added back by running the uninsulated liquid line through a blazingly hot attic. You should consult your condensor's service manual for the manufacturer's recommendation on this. I insulated my liquid line, and now, on hot summer days, my AC runs less often, and my indoor humidity has dropped by 4 percentage points because the liquid coolant reaching the evaporator is ... well ... cooler!
For additional explanation, see https://youtu.be/QDIKtN3J3S0
It includes a YouTube link which I have not clicked, so I don't know if this is spammy, appropriate, etc. or not.
Realistically, I'd think that the editor should be directed to make his own answer indicating that this is "supplemental info" to the "other very good answers", or perhaps linking to the specific answer he targeted.
Again, it's not wrong info, it's just above and beyond. My understanding that edits are supposed to improve a specific answer in terms of spelling, grammar, formatting, etc., not adding more info.