add missing lang for code-block

NixOS · Nov 4, 2023 · 875b51d · 875b51d
1 parent bd9bd93
commit 875b51d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/source/tutorials/module-system/module-system.md b/source/tutorials/module-system/module-system.md
@@ -929,7 +929,7 @@ Now add a mapping for the size parameter in `paramForMarker`, which selects an a
 
 Finally, add another `lib.optional` call to the `attributes` string, making use of the selected size:
 
-```
+```{code-block} diff
 :caption: marker.nix
            attributes =
              lib.optional