Fix incorrect documentation for `str::{split_at, split_at_mut}`#70588

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bors merged 1 commit intorust-lang:masterfrom

Coder-256:str-split-at-docs

Mar 31, 2020

Commits on Mar 30, 2020

Fix incorrect documentation for `str::{split_at, split_at_mut}`
Coder-256
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