Docs: Fix Hacking guide bulleting

* fix list formatting of fixtures section

Change-Id: I9b2c11c59c34cae0086e2af507aa85313b8480bc
Closes-Bug: #1582350
diff --git a/HACKING.rst b/HACKING.rst
index b66fa24..d3ac5c6 100644
--- a/HACKING.rst
+++ b/HACKING.rst
@@ -132,16 +132,16 @@
 
 Set-up is split in a series of steps (setup stages), which can be overwritten
 by test classes. Set-up stages are:
-- `skip_checks`
-- `setup_credentials`
-- `setup_clients`
-- `resource_setup`
+ - `skip_checks`
+ - `setup_credentials`
+ - `setup_clients`
+ - `resource_setup`
 
 Tear-down is also split in a series of steps (teardown stages), which are
 stacked for execution only if the corresponding setup stage had been
 reached during the setup phase. Tear-down stages are:
-- `clear_credentials` (defined in the base test class)
-- `resource_cleanup`
+ - `clear_credentials` (defined in the base test class)
+ - `resource_cleanup`
 
 Skipping Tests
 --------------