Use detailed and shorter fs error explaination

Includes suggestion from the8472 rust-lang#79390 (comment)

More detail error explanation in fs doc

library/std/src/fs.rs

@@ -1676,9 +1676,9 @@ pub fn rename<P: AsRef<Path>, Q: AsRef<Path>>(from: P, to: Q) -> io::Result<()>
 /// This function will return an error in the following situations, but is not
 /// limited to just these cases:
 ///
-/// * The `from` path is not a file.
-/// * The `from` file does not exist.
-/// * The current process does not have the permission rights to access
+/// * `from` is neither a regular file nor a symlink to a regular file.
+/// * `from` does not exist.
+/// * The current process does not have the permission rights to read
 ///   `from` or write `to`.
 ///
 /// # Examples