man page: fix incorrect description for disable_clat option

Signed-off-by: Steven Noonan <snoonan@amazon.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/fio.1 b/fio.1
index ad5040b..2ae4cf2 100644
--- a/fio.1
+++ b/fio.1
@@ -823,7 +823,7 @@
 calls, this option must be used with disable_slat and disable_bw as well.
 .TP
 .B disable_clat \fR=\fPbool
-Disable measurements of submission latency numbers. See \fBdisable_lat\fR.
+Disable measurements of completion latency numbers. See \fBdisable_lat\fR.
 .TP
 .B disable_slat \fR=\fPbool
 Disable measurements of submission latency numbers. See \fBdisable_lat\fR.