I'm trying to find out if there is something wrong with my raspberry plant. I was gifted with this plant two weeks ago. It did have some damage, which I cut away, but I don't remember making this cut as I would not have cut it at a diagonal. Please help-if you know what it is, please advise me on how to control/remove the damage. I'm leaning towards cane/spur blight, but don't want to make a mistake and cut away a healthy cane that's just in the process of winter dieback. I live in zone 7. It's a heritage everbearing raspberry. Thank you!