wrong parsing of nested lists 

When parsing a list of maps and the last item of an map contains an non bracketed list the next outer list item will be intermixed with the inner one:
```yaml
- l: 
  - a
- l:
  - b
```
will result in:
```yaml
- l: [ a, l: [ b ] ]
```
instead of
```yaml
- l: [a]
- l: [b]
 ```