You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: libmng.rb
    path of file: ./repos/homebrew-core/Formula/lib
    
    the code of the file until where you have to start completion: class Libmng < Formula
  desc "MNG/JNG reference library"
  homepage "https://sourcefo
    
  def install
    system "./configure", *std_configure_args, "--disable-silent-rules"
    system "make", "install"

    # Keep an example for test purposes, but fix header location to use system-level includes
    inreplace "contrib/gcc/mngtree/mngtree.c", "\"../../../libmng.h\"", "<libmng.h>"
    pkgshare.install "contrib/gcc/mngtree/mngtree.c"
  end