This essentially rewrites the sorting algorithm, which relied on
the implementation-defined handling of non-consistent sorting function
(cf. ECMA-262 5th edition, section 15.4.4.11)
and was also a bit inefficient.
The new criteria expands the prior criteria while adding these ones:
- The current crate is always preferred over other crates.
(Closes#13178)
- An item with a description is preferred over one without it,
if item names match. This is a heuristic assuming that
the documented item is more likely to be relevant.
- An item with no literal occurrence of search query is handled correctly.
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