docs: fix rendering of DNSZoneRecord

diff --git a/docs/appendices/backend-writers-guide.rst b/docs/appendices/backend-writers-guide.rst
index 87ac2f61159a1940d3b9a79f746b40d2b119b192..1ee3046a95d40bbd820f156db15767c17b825951 100644 (file)
--- a/docs/appendices/backend-writers-guide.rst
+++ b/docs/appendices/backend-writers-guide.rst
@@ -970,6 +970,7 @@ Some just hold content, some hold a whole record.
 Below, we'll show the class definitions of each (with some details omitted, but with some useful words added) to help you find your way.
 
 .. code-block:: cpp
+
   struct DNSZoneRecord
   {
     int domain_id{-1};