test/helpers: remove extra whitespace

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/test/helpers.c b/test/helpers.c
index 2350c11..a2b98db 100644
--- a/test/helpers.c
+++ b/test/helpers.c
@@ -23,7 +23,6 @@
 	return ret;
 }
 
-
 /*
  * Helper for allocating size bytes aligned on a boundary.
  */
@@ -68,7 +67,6 @@
 	assert(ret == size);
 }
 
-
 /*
  * Helper for creating @buf_num number of iovec
  * with @buf_size bytes buffer of each iovec.
@@ -85,4 +83,3 @@
 	}
 	return vecs;
 }
-