qemu-iotests: Whitespace cleanup

These scripts used to have a four characters indentation, with eight
consecutive spaces converted into a tab. Convert everything into spaces.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
diff --git a/tests/qemu-iotests/common.pattern b/tests/qemu-iotests/common.pattern
index 85a40ee..00e0f60 100644
--- a/tests/qemu-iotests/common.pattern
+++ b/tests/qemu-iotests/common.pattern
@@ -106,8 +106,8 @@
     local num=$3
 
     # Pattern (repeat after 9 clusters):
-    #	used - used - free - used - compressed - compressed -
-    #	free - free - compressed
+    #        used - used - free - used - compressed - compressed -
+    #        free - free - compressed
 
     # Write the clusters to be compressed
     echo === Clusters to be compressed [1]