cleanup, docs

site/doc/pages/yaml_encode.txt

@@ -21,32 +21,9 @@ Try the live example in the [YAML demo](../demo/yaml.uce).
 
 Example:
 
-```uce
-DValue cfg;
-cfg["app"]["name"] = "UCE Starter";
-cfg["app"]["debug"].set_bool(true);
-cfg["app"]["port"] = (f64)8080;
-
-DValue path;
-path = "site";
-cfg["app"]["paths"].push(path);
-path = "cache";
-cfg["app"]["paths"].push(path);
-
-String yaml = yaml_encode(cfg);
-```
 
 Typical result:
 
-```yaml
-app:
-  debug: true
-  name: UCE Starter
-  paths:
-    - site
-    - cache
-  port: 8080
-```
 
 Notes:
 
@@ -55,3 +32,8 @@ Notes:
 - Multiline strings are emitted as literal block scalars with `|`.
 - Empty strings are emitted as `""` so they are not confused with YAML null.
 - Decoded numeric-looking config values are strings unless the original `DValue` value was explicitly numeric.
+
+:example
+DValue value;
+value["name"] = "Ada";
+print(yaml_encode(value) != "" ? "yaml\n" : "empty\n");