crypto/des: fix a typo in the comment for permuteFinalBlock
The comment copy pasted from the permuteInitialBlock and should be fixed.
Change-Id: I101f1deceadf9b0480e5b679e4e237bda601950b
GitHub-Last-Rev:
7662df772e4ac171c79467678861ac4d7547da78
GitHub-Pull-Request: golang/go#56982
Reviewed-on: https://go-review.googlesource.com/c/go/+/453995
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>