It's all about style, naturally.

lib/libzutil/zutil_import.c

@@ -1011,24 +1011,24 @@ zpool_read_label(int fd, nvlist_t **config, int *num_labels)
 
 		if (errno == EAGAIN || errno == EINTR || errno == EIO) {
 			/*
-			 * A portion of the requests may have
-			 * been submitted. Clean them up.
+			 * A portion of the requests may have been submitted.
+			 * Clean them up.
 			 */
 			for (l = 0; l < VDEV_LABELS; l++) {
 				errno = 0;
 				switch (aio_error(&aiocbs[l])) {
-					case EINVAL:
-						break;
-					case EINPROGRESS:
-						// This shouldn't be possible to
-						// encounter, die if we do.
-						ASSERT(B_FALSE);
-					case EOPNOTSUPP:
-					case ENOSYS:
-						do_slow = B_TRUE;
-					case 0:
-					default:
-						(void) aio_return(&aiocbs[l]);
+				case EINVAL:
+					break;
+				case EINPROGRESS:
+					// This shouldn't be possible to
+					// encounter, die if we do.
+					ASSERT(B_FALSE);
+				case EOPNOTSUPP:
+				case ENOSYS:
+					do_slow = B_TRUE;
+				case 0:
+				default:
+					(void) aio_return(&aiocbs[l]);
 				}
 			}
 		}