What does a single exclamation mark do in YAML?
That ! is the non-specific tag. The YAML specification 1.2 (as well as the previous 1.1) says that : By explicitly specifying a “!” non-specific tag property, the node would then be resolved to a “vanilla” sequence, mapping, or string, according to its kind. Take a look here to the tag “grammar”: none : Unspecified … Read more