As far as I understand the copyright policy [1], there shouldn't be a copyright notice in the header. The way I understand it, pull requests are contributions submitted directly to the ASF, so they don't fall into the "third-party work" category, but I'm not a legal expert; it would be great if someone could clarify this.
Thanks, Ignasi! I think the doc you linked is pretty clear on what can and cannot be included...lazy me for not looking!
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