extraneous material in annotation not reported

[mbakeranalecta]

 Testing {X}(a b)

b should be reported.

[mbakeranalecta]

Actually, the annotation is not being detected at all, so

 {X}(a b)

yields an unannotated phrase warning and renders (a b) as regular text.

This is not so bad and is consistent with the practice of other lightweight languages.

Still worth fixing, though.