YAML is not a superset of JSON 2 years ago
No, the YAML parser is a valid YAML 1.1 parser, where this behaviour is totally correct and in spec.
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endycm
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YAML is not a superset of JSON 2 years ago
Author has no clue, but I don't blame him.
There are - similar to the JSON insanity - multiple YAML standards.
YAML 1.1 and 1.2+ are the important ones, as the "superset" argument is only valid since 1.2.
HOWEVER PyYAML is a YAML 1.1 parser: https://pypi.org/project/PyYAML/#description
This also can be responsible for many security problems, as ppl will assume things about JSON and YAML, but don't worry about which of the 8 different JSON standards / YAML implementations they use.