mkRedundantOption: use lib.literalMd to hopefully format correctly

flake.nix

@@ -55,7 +55,13 @@
 
     mkRedundantOption = name: value: attrs: lib.mkOption {
       inherit (attrs) type default;
-      description = "${attrs.description}\n\n!!! warning\n    ${mkRedundantOptionDescription name value}";
+      description = lib.literalMD ''
+        ${attrs.description}
+
+
+        !!! warning
+            ${mkRedundantOptionDescription name value}";
+      '';
     };
   };
 }