bors c7ce69faf2 Auto merge of #92962 - frank-king:btree_entry_no_insert, r=Amanieu ... BTreeMap::entry: Avoid allocating if no insertion This PR allows the `VacantEntry` to borrow from an empty tree with no root, and to lazily allocate a new root node when the user calls `.insert(value)`.		2022-03-20 11:20:26 +00:00
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benches	update vec::retain benchmarks	2021-12-04 16:20:35 +01:00
src	Auto merge of #92962 - frank-king:btree_entry_no_insert, r=Amanieu	2022-03-20 11:20:26 +00:00
tests	Rollup merge of #93950 - T-O-R-U-S:use-modern-formatting-for-format!-macros, r=Mark-Simulacrum	2022-03-10 23:12:57 +01:00
Cargo.toml	Switch all libraries to the 2021 edition	2021-12-23 19:03:47 +08:00