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