anchor.diff:      ;
   
   tableheader
  -    : ('|=' markup)+ '|' WS*
  +    : ('|=' markup+)+ '|' WS*
       ;
   
   tablerow
  
positive.code: 
  nowiki
      : NOWIKI
      ;
  
  BACKSLASH
      : '\\'
      ;
  
  HASH
  
negative.code:     | ')'
      | '-'
      | '/'
      | '\\'
      | '\''
      | '~'
      | '"'
      | '+'
      ;
  