gifspnge(1) on Linux
The text 6c4d34d44b5a, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it. The page shows this text now.
This is an expensive way to copy a GIF. The source is included as a skeleton for more sophisticated filters using DGifSlurp() and EGifSpew(). See the source in the util directory for details. I suppose this does have some utility as a test of DGifSlurp() and EGifSpew(). The output should be bytewise identical to the input.