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Fix issues in std-types/result.md (#2186)

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The expression excercise is using the standard `Result` type instead of
`Res`.

Co-authored-by: Jason Lin <lxj@google.com>
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Jason Lin 2024-07-06 01:04:46 +10:00 committed by GitHub
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src/std-types/result.md
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@ -5,9 +5,8 @@ minutes: 5
# Result
`Result` is similar to `Option`, but indicates the success or failure of an
operation, each with a different type. This is similar to the `Res` defined in
the expression exercise, but generic: `Result<T, E>` where `T` is used in the
`Ok` variant and `E` appears in the `Err` variant.
operation, each with a different enum variant. It is generic: `Result<T, E>`
where `T` is used in the `Ok` variant and `E` appears in the `Err` variant.
```rust,editable
use std::fs::File;