Remove unnecessary verb from doc comment of `dup`
@@ -417,7 +417,7 @@ feature! {
/// Create a copy of the specified file descriptor (see
/// [dup(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/dup.html)).
///
-/// The new file descriptor will be have a new index but refer to the same
+/// The new file descriptor will have a new index but refer to the same
/// resource as the old file descriptor and the old and new file descriptors may
/// be used interchangeably. The new and old file descriptor share the same
/// underlying resource, offset, and file status flags. The actual index used
