That's true. And, in my understanding, what OO did, falls exactly in paragraph b and d. The license doesn't describe what is the "Appropriate Legal Notices" and OO provided a description for it: its logo and its trademark.
No, logos and trademarks are neither "legal notices" nor "author attributions". It's simply not what those words mean. A "legal notice" is some sort of legally relevant document. An "author attribution" is a plaintext recognition of the original copyright holder.
If you look at the repo, it looks like the did fail to include author attributions, as far as I can see. The source files need to say they were originally written by OO. That's what author attribution means.
If you look at the repo, it looks like the did fail to include author attributions, as far as I can see. The source files need to say they were originally written by OO. That's what author attribution means.
https://en.wikipedia.org/wiki/Attribution_(copyright)
https://en.wikipedia.org/wiki/Notice