At top of e.g. https://dlang.org/library/core/stdc/stdlib.html:
> from the standard C header <stdlib.h>.
It should be <stdlib.h> for the link text. The HTML source for that page has some weird markup for the link text:
<code class="lang-d"><span class="pun">&</span><span class="pln">lt</span><span class="pun">;</span><span class="pln">stdlib<wbr></span><span class="pun">.</span><span class="pln">h</span><span class="pun">&</span><span class="pln">gt</span><span class="pun">;</span></code>
Comment #1 by robert.schadek — 2024-12-15T15:27:45Z