The running example of the Linting chapter: a ruleset that extends a base, enables a rule by shorthand, declares an alias, and overrides a severity for legacy documents, linting one legacy document.
Covers /req/extends/load, /req/overrides/scope, /req/shorthands/true, /req/formats/ruleset-default, /req/given/alias-expansion, /req/result/severity. Expected: 3 results.