cleanup, docs

site/doc/pages/2_DValue_has.txt

@@ -6,6 +6,7 @@ s : child key to test
 return value : true when the dereferenced value is map-shaped and contains the key
 
 :see
+>types
 0_DValue
 2_DValue_key
 2_DValue_get_by_path
@@ -13,6 +14,7 @@ return value : true when the dereferenced value is map-shaped and contains the k
 :content
 Checks for a child key without creating it. Returns false for scalars and missing keys.
 
-```cpp
-if(context.props.has("title")) print(context.props["title"].to_string());
-```
+:example
+DValue user;
+user["name"] = "Ada";
+print(user.has("name") ? "yes\n" : "no\n");