class Syntax::Token

lexeme.
itself, decorated with a ‘group’ attribute to identify the type of the
A single token extracted by a tokenizer. It is simply the lexeme

def initialize( text, group, instruction = :none )

given group.
Create a new Token representing the given text, and belonging to the 
def initialize( text, group, instruction = :none )
  super text
  @group = group
  @instruction = instruction
end