clean up whitespace issues on exercises and friends

Change-Id: I812a73e46ddd4d5fed4d304d9ef92c1de243f497
diff --git a/exercises/volumes.sh b/exercises/volumes.sh
index e536d16..9ee9fa9 100755
--- a/exercises/volumes.sh
+++ b/exercises/volumes.sh
@@ -117,7 +117,7 @@
 INSTANCE_TYPE=$(nova flavor-list | grep $DEFAULT_INSTANCE_TYPE | get_field 1)
 if [[ -z "$INSTANCE_TYPE" ]]; then
     # grab the first flavor in the list to launch if default doesn't exist
-   INSTANCE_TYPE=$(nova flavor-list | head -n 4 | tail -n 1 | get_field 1)
+    INSTANCE_TYPE=$(nova flavor-list | head -n 4 | tail -n 1 | get_field 1)
 fi
 
 # Clean-up from previous runs