Why does std::vec::Vec::to_vec() exist?

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Just to follow up on my previous comment, adding the following CSS to any page on docs.rs does the trick

.small-section-header {
    position: sticky;
    top: 0;
    z-index: 2;
    background-color: #353535;
}

Naturally, the background-color will need to change alongside the theme. The expand/collapse button is still visible underneath this, as the element doesn't sit far enough to the left. But as a quick fix, this little snippet of code suffices (and in my opinion is actually far better).

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