def assembler_names
      a = []
      @assemblers.each do |t|
        a << t.name
        a << t.shortname if t.shortname
      end
      a
    end
def assembler_names
      a = []
      @assemblers.each do |t|
        a << t.name
        a << t.shortname if t.shortname
      end
      a
    end
load_assemblers
 Collect all valid names for available assemblers

 @return [Array<String>] names and shortnames (if
          applicable) for available assemblers.