Yaml Filter Error with empty value

[Former user]

Yaml Filter doesnt handle Yaml files with an empty value even if its considered valid YAML format.

Example yaml content :

docs_list_title: Documentation Title
docs:

Error gotten :

Caused by: net.sf.okapi.filters.yaml.parser.ParseException: Encountered unexpected token: "docs" <PLAIN_SCALAR>
    at line 2, column 1.

Was expecting one of:

    "BLOCK_END"
    <DOUBLE_QUOTED_KEY>
    <PLAIN_KEY>
    <SINGLE_QUOTED_KEY>

    at net.sf.okapi.filters.yaml.parser.YamlParser.generateParseException(YamlParser.java:1766)
    at net.sf.okapi.filters.yaml.parser.YamlParser.jj_consume_token(YamlParser.java:1634)
    at net.sf.okapi.filters.yaml.parser.YamlParser.block_mapping(YamlParser.java:876)
    at net.sf.okapi.filters.yaml.parser.YamlParser.mapping(YamlParser.java:779)
    at net.sf.okapi.filters.yaml.parser.YamlParser.node(YamlParser.java:215)
    at net.sf.okapi.filters.yaml.parser.YamlParser.yaml_document(YamlParser.java:123)
    at net.sf.okapi.filters.yaml.parser.YamlParser.yaml_stream(YamlParser.java:76)
    at net.sf.okapi.filters.yaml.parser.YamlParser.parse(YamlParser.java:29)
    at net.sf.okapi.filters.yaml.YamlFilter.open(YamlFilter.java:213)