libvte-2.90-9 1:0.28.0-1ubuntu3 (amd64 binary) in ubuntu oneiric

 The VTE library inserts terminal capability strings into a trie, and then
 uses it to determine if data received from a pseudo-terminal is a control
 sequence or just random data. The sample program "interpret" illustrates
 more or less what the widget sees after it filters incoming data.