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Rollup merge of #135415 - Harshit933:hard-link-error, r=ChrisDenton

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Add `File already exists` error doc to `hard_link` function

## Description
If the link path already exists, the error `AlreadyExists` is returned. This commit adds this error to the docs.

I tested it with the current rust master version, this error was returned when there is already a link for the file is present.
This was the error returned:
```
[harshit:../Desktop/rust_compiler_testing/hard_link (master|…5)] cargo +stage1 run
   Compiling hard_link v0.1.0 (/home/harshit/Desktop/rust_compiler_testing/hard_link)
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
     Running `target/debug/hard_link`
Err(Os { code: 17, kind: AlreadyExists, message: "File exists" })
```
This is my first PR on rust, any suggestions on which issue I can take next are most welcome 😄

Fixes #130117
This commit is contained in:
Matthias Krüger 2025-01-24 23:25:41 +01:00 • committed by GitHub
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library/std/src/fs.rs
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@ -2529,6 +2529,7 @@ pub fn copy<P: AsRef<Path>, Q: AsRef<Path>>(from: P, to: Q) -> io::Result<u64> {
/// limited to just these cases: /// limited to just these cases:
/// ///
/// * The `original` path is not a file or doesn't exist. /// * The `original` path is not a file or doesn't exist.
/// * The 'link' path already exists.
/// ///
/// # Examples /// # Examples
/// ///