So my friend, a beta reader for my novel, pointed out a paragraph that could be written better. He used three simple words that I never thought of to make that scene more descriptive, which I agree, looks better with his suggestion. My version of the paragraph is fine too and gets the job done, but I really like his suggestion. So I've taken what he wrote, two sentences, and just stole the three words and logic of it to integrate it into the paragraph. For some reason, I feel this is plagiarism. Is it considered plagiarism if he's fine with it? Will I have legal troubles hypothetically in the future if something ever happened between us and our friendship gets sour? (which I hope nothing like that ever happens) He hasn't suggested any other such major change in the rest of my novel, nor have any of my beta readers. The rest of the novel is fine. It's just this change he's suggested, which I'm hitting my head over for not thinking of.