A node property written on its own indented line can sit above a block sequence
whose entries return to the mapping key's own indentation (`seq:` then
` &anchor` then `- a` at the key's column). The grammar allows a block-in-block
sequence at its parent's indent n while the property sits at n+1, so the
indent's matching dedent falls between the property and the entries.
The parser consumed the property as an empty anchored value and then rejected
the entries as an unexpected block entry. It now recognises the property-then-
dedent-then-entry shape, consumes that dedent, and binds the property to the
block sequence that follows.
Fixes yaml-test-suite SKE5; raises parse-level conformance to 311/333 (93.4%)
and value-level to 204/204 (100.0%), with the should-error rate unchanged.
Mihaela M
5528ce9aa4