The std doc page for [std.container.binaryheap] example uses a routine named "heapify" but there is no documentation about it in the page with the rest of the functions. Users have to look at the source to figure out where this function came from.
The ddoc page does list it: https://dlang.org/phobos/std_container_binaryheap.html ddox lists it here: https://dlang.org/library-prerelease/std/container/binaryheap.html This sub-page doesn't (but that's the intended design of ddox): https://dlang.org/library-prerelease/std/container/binaryheap/binary_heap.html
You are right - my bad. I'll blame it on not enough coffee. Feel free to delete, mark complete or whatever is the appropriate way to dispose of this report. Thank you.