Rollup merge of #79399 - pickfire:patch-3, r=JohnTitor

Use detailed and shorter fs error explaination

Includes suggestion from `@the8472` https://github.com/rust-lang/rust/issues/79390#issuecomment-733263336

library/std/src/fs.rs

@@ -1677,9 +1677,9 @@ 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