Fix trivial typo in comment.
@@ -2416,7 +2416,7 @@ class VolumeManager(manager.CleanableManager,
# swappy thing so it's a bit confusing, but it does unwind properly
# when you step through it)
- # In the new flow we simlified this and we don't need it, instead of
+ # In the new flow we simplified this and we don't need it, instead of
# doing a bunch of swapping we just do attachment-create/delete on the
# nova side, and then here we just do the ID swaps that are necessary
# to maintain the old beahvior
