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Fix typo in string.md (#456)

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* Fix typo in string.md

* Update src/std/string.md

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Co-authored-by: Martin Geisler <martin@geisler.net>
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Adam MacBeth 2023-02-27 07:37:08 -06:00 committed by GitHub
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src/std/string.md
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@ -35,6 +35,6 @@ fn main() {
* `String` implements `Deref<Target = str>` which transparently gives it access to `str`'s methods.
* Write and compare `let s3 = s1.deref();` and `let s3 = &*s1`;.
* `String` is implemented as a wrapper around a vector of bytes, many of the operations you see supported on vectors are also supported on `String`, but with some extra guarantees.
* Compare the different ways to inde a Strings by using `s3[i]` and `s3.chars.nth(i).unwrap()` where `i` is in-bound, out-of-bounds, and "on" the flag unicode character.
* Compare the different ways to index a `String` by using `s3[i]` and `s3.chars().nth(i).unwrap()` where `i` is in-bound, out-of-bounds, and "on" the flag Unicode character.
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