HOWTO: fix typo

Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/HOWTO b/HOWTO
index 57911b4..2cecbbb 100644
--- a/HOWTO
+++ b/HOWTO
@@ -392,7 +392,7 @@
 		For certain types of io the result may still be skewed a bit,
 		since the speed may be different. It is possible to specify
 		a number of IO's to do before getting a new offset, this is
-		one by appending a ':<nr>' to the end of the string given.
+		done by appending a ':<nr>' to the end of the string given.
 		For a random read, it would look like 'rw=randread:8' for
 		passing in an offset modifier with a value of 8. If the
 		suffix is used with a sequential IO pattern, then the value
@@ -567,7 +567,7 @@
 		while having 90% 4k writes and 10% 8k writes, you would
 		specify:
 
-		bssplit=2k/50:4k/50,4k/90,8k/10
+		bssplit=2k/50:4k/50,4k/90:8k/10
 
 blocksize_unaligned
 bs_unaligned	If this option is given, any byte size value within bsrange