Fix docs build errors

Fix shocco errors during docs generation

Closes-Bug: 1362691
Change-Id: I2b7fb008c89f0b4e7280b2d0a054320765e83e47
diff --git a/lib/nova_plugins/functions-libvirt b/lib/nova_plugins/functions-libvirt
index f722836..3a367c2 100644
--- a/lib/nova_plugins/functions-libvirt
+++ b/lib/nova_plugins/functions-libvirt
@@ -10,7 +10,7 @@
 set +o xtrace
 
 # Defaults
-# -------
+# --------
 
 # if we should turn on massive libvirt debugging
 DEBUG_LIBVIRT=$(trueorfalse False $DEBUG_LIBVIRT)