The important point here is that there's no minimum length for code to be copyrightable. It simply needs to be original and at least minimally creative. Since at least thousands of other developers have found the snippet to be useful enough to directly borrow rather than writing an equivalent, it sure looks copyrightable to me.
The Software Freedom Law Center has a substantial article on copyrightability of code: https://softwarefreedom.org/resources/2007/originality-requi...
The important point here is that there's no minimum length for code to be copyrightable. It simply needs to be original and at least minimally creative. Since at least thousands of other developers have found the snippet to be useful enough to directly borrow rather than writing an equivalent, it sure looks copyrightable to me.