- prolog:doc_wiki_face(-Out, +VarNames)// is semidet[private]
 - prolog:doc_wiki_face(-Out, +VarNames, +Options0)// is semidet[private]
 - Hook that can be used to provide additional processing for
additional inline wiki constructs. The DCG list is a list of
tokens. Defined tokens are:
- w(Atom)
 - Recognised word (alphanumerical)
 - Atom
 - Single character atom representing punctuation marks or the
atom 
' '(space), representing white-space. 
The Out variable is input for the backends defined in
doc_latex.planddoc_html.pl. Roughly, these are terms similar to what html//1 from library(http/html_write) accepts.