extra braces while dumping map data as yaml about snakeyaml HOT 1 CLOSED

please check FAQ here: http://code.google.com/p/snakeyaml/wiki/Documentation

By default, SnakeYAML chooses the style of a collection depending on whether it 
has 
nested collections. If a collection has nested collections, it will be assigned 
the 
block style. Otherwise it will have the flow style.

More info for the style is here: 
http://yaml.org/spec/1.1/#flow%20style/information%20model

You can define the style (block or flow) in the DumperOptions.