firestring_estr_areplace(3) on Linux
The text 0ffd9a4ca743, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it. The page shows this text now.
Replace occurences of one string with another, allocating space if needed