# E4 (extra-spec): leading sign char on zero rejected. "-0" is non-canonical → ineligible.
# Eligible key: "0" only. Impl test: getList("items") returns ["b"].
# Lightbend behaviour: HashMap collision ("-0" and "0" both parse to 0); non-deterministic
# winner. Documented in expected/.../na10b-minus-zero.divergence.md.
items = {"-0":"a","0":"b"}