Yuki Okushi 162f400328
Rollup merge of #78538 - ssomers:btree_testing_rng, r=Mark-Simulacrum
BTreeMap: document a curious assumption in test cases

r? ```@Mark-Simulacrum```
2020-11-07 01:02:09 +09:00
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2020-09-29 21:39:24 +08:00