Comments of the first item of a multiple maps is associated to the map itself

[nervo]

In case of a map with multiple items, the first item comments are associated to the map node itself.
Single maps items, or other multiple maps items comments are not affected.

Here, in a single item map, foo node is a single ast.MappingValueNode and correctly get its comments:

map_single:
    # foo single comment
    foo: bar

In this multiple items maps, map node is a ast.MappingNode, and get the comments of its first item. This first item comments are therefore empty, whereas the second item comments are correctly set:

map_multiple:
    # foo multiple comment
    foo: bar
    # bar multiple comment
    bar: baz

See this playground: https://go.dev/play/p/HpPFOrJkVwF

(this could be more or less related to #310)

[goccy]

Thank you for your reporting ! I'll fix this problem.