# File lib/facets/sys.rb, line 158
  def nice_only( exts )
    exts = exts.dup
    NOAUTO.each do |f|
      if f.include?('*')
        re = %r"#{f.gsub('*','.*')}"
        exts.reject!{ |x| x =~ re }
      elsif exts.include?(f)
        exts.delete f
      end
    end
    exts.sort
  end