Fix a few spelling errors

Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/examples/rbd.fio b/examples/rbd.fio
index fcb494a..9d73ca1 100644
--- a/examples/rbd.fio
+++ b/examples/rbd.fio
@@ -1,9 +1,9 @@
 ######################################################################
 # Example test for the RBD engine.
 # 
-# Runs a 4k random write test agains a RBD via librbd  
+# Runs a 4k random write test against a RBD via librbd
 #
-# NOTE: Make sure you have either a RBD named 'fio_test' or change 
+# NOTE: Make sure you have either a RBD named 'fio_test' or change
 #       the rbdname parameter.
 ######################################################################
 [global]
diff --git a/fio.1 b/fio.1
index fa2ac70..77faa45 100644
--- a/fio.1
+++ b/fio.1
@@ -946,7 +946,7 @@
 .BI startdelay \fR=\fPirange
 Delay start of job for the specified number of seconds. Supports all time
 suffixes to allow specification of hours, minutes, seconds and
-milliseconds - seconds are the default if a unit is ommited.
+milliseconds - seconds are the default if a unit is omitted.
 Can be given as a range which causes each thread to choose randomly out of the
 range.
 .TP