def label(self, name, internal=False, definition=False):
return "<STR_LIT>".format(self.internal if internal else "<STR_LIT>", name, self.definition if definition else "<STR_LIT>")<EOL>
Generates label name (helper function)
           name - label name
           internal - boolean value, adds "@" prefix to label
           definition - boolean value, adds ":" suffix to label