fix unicode bug

Author: esdandreu

vao-recorder.py

@@ -87,11 +87,10 @@ def typer_warn(message: str):
 
 
 def yaml_dump(data, to_file: Path = None) -> str:
-    content = yaml.dump(data, allow_unicode=True)
     if to_file:
         with open(to_file, 'w') as f:
-            f.write(content)
-    return content
+            return yaml.dump(data, stream=f, allow_unicode=True)
+    return yaml.dump(data, allow_unicode=True)
 
 
 # ------------------------------ Configuration ------------------------------ #