-- Parser for span-level styles

Predicates for recognizing span-level style formatting like strong, emphasis and code.

 md_span_decorate(-Span, +Allow)// is det
Recognizes style formatting in the middle of span text. Span is a term functor(Codes) where the functor is one of: strong, em or code. Allow is a list of allowed span elements. May contain strong, em, del and code.