et specification specified on the command line',
src => q([[prog]] --feature-set-data-json '{"v":1, "summary":"Foo", "features":{"feature1":{}, "feature2":{"schema":"uint*","req":1}}}'),
mmary => 'Check feature declaration specified on the command line as JSON',
src => q([[prog]] --features-decl-data-json '{"v":1, "features":{"TextTable": {"can_halign":0}}}'),
},