Fix comment

src/shims/files.rs

@@ -277,8 +277,8 @@ impl VisitProvenance for WeakFileDescriptionRef {
 
 /// A unique id for file descriptions. While we could use the address, considering that
 /// is definitely unique, the address would expose interpreter internal state when used
-/// for sorting things. So instead we generate a unique id per file description that stays
-/// the same even if a file descriptor is duplicated and gets a new integer file descriptor.
+/// for sorting things. So instead we generate a unique id per file description is the name
+/// for all `dup`licates and is never reused.
 #[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Ord, PartialOrd)]
 pub struct FdId(usize);